Laptop gaming didn't happen until XP or later, so I don't see that many people spending cash to have a shitty Win98 experience on commodity laptops.
Congrats you were one of the 1% who did.
... no? I mean, yeah, sure, obviously nobody living in the late 90's that was serious about gaming would have bought a laptop *instead* of a desktop gaming rig, but people certainly *played* games on laptops before Windows XP came out. (Remember, XP didn't actually hit general availability until October 2001; Windows 2000 was "out" since late 1999 but it was pretty rare in the wild, even most corporate laptops came with 98 until XP came out.) At the place I was working in 2000 the standard issue laptop was Dell Inspiron 3800s (they were saving a few bucks over buying the Latitude equivalent) and although most of the engineers were running a Linux or BSD on them during work hours everyone kept a Windows 98 dual boot installed so they could play Half-Life/Team Fortress/Unreal Tournament/whatever after hours. Obviously not everyone used their laptops, some guys stuffed Voodoo or early Nvidia cards in their desktops, but a skilled player on their doggy Pentium III laptop with a Rage Mobility M1(*) with graphics detail turned down to "animatic" could still be a formidable opponent.
(* The Rage Mobility M1 was on the higher end of laptop graphics chipsets in late 1999 but far from top of the line; it was basically a Mach64 with some mild steroid injections and charitably would benchmark somewhere between a Riva128 and RivaTNT desktop card. About the best you could get was the Mobility 128s, which were in the RivaTNT2 ballpark. Sorta.)
Maybe "nobody" 3D gamed on the gutless Windows 95 laptops with low-end Pentiums and C&T VGA chipsets without a single ounce of 3D acceleration (IE, something like the Toshiba Satellite Pro 400 series) that were typical up until the end of 1998 or so, but there was a whole generation (around 4 years worth) of laptops that were at least *minimally* capable of running 3D games (even if it was with chipsets that were mostly a joke, like the S3 3D ViRGE) produced during the era for which Windows 9x was the most common OS for laptops, and for casual 3D gaming on the go they were better than nothing. Per
@Plasma's comment, let's be clear-eyed, *everyone* played Solitaire/minesweeper/etc on their laptops, *ZERO* exceptions, and there were a ton of other casual games that didn't rely on 3D acceleration. If we include those under the umbrella of "gaming" then it's really ridiculous to say that only "1%" of laptop owners "gamed" in the Windows 9x era.
Anyway. To be clear here, I'm not actually making the case that buying a laptop specifically to run Windows 9x on makes any sense. There are ways to run almost all the games from this era sandboxed on modern Windows, or even alternative operating systems, so I personally don't see the point of investing in flaky old hardware to do it unless the goal is very specifically to experience some weird piece of hardware like an oddball 3D accelerator for which an emulator (like, say, the GLIDE emulators for Voodoo-specific games) just won't do. (And clearly a laptop won't qualify for that job anyway.) But I guess the flip side here is this: if I'm interpreting the benchmarks that are out there correctly a laptop like a Dell D600/Inspiron 600m, if you get everything working, will actually run Windows 9x games with about the same level of performance as a pretty well fitted out 2001-ish gaming desktop. (The Mobility 9000 looks like it has roughly comparable pixel-shoving power as a GeForce 2-ish level desktop graphics card, a Pentium M at 1.5Ghz is up there with a Thunderbird Athlon or the very best Windows 9x-era Pentium 4s.) If you're crazy enough to actually have nostalgia for Windows 9x, want to run it bare metal, and don't have room in your life for a period desktop(*), maybe a machine like this could scratch a legitimate itch.
(* It's not just people in Japan that have to put limits on how many big metal boxes they bring into their houses.)
More broadly I guess someone would have to ask *why* they want to run these games on vintage hardware in the first place. I'll be blunt, I have to admit to me at least it kind of seems like missing the point to build a "nostalgia machine" if it's using parts that don't actually fit the period you're trying to recreate and performs at a level you never could have achieved (or afforded). I have some pretty specific memories of how games ran on late-1999-early-2000 vintage hardware, and honestly I think the jank of an underpowered video card was part of the fun. I'm going to guess if I were to install some of those games on my D600 they'll perform disappointingly too well to really be nostalgic.
(I remember installing "Star Wars Episode I Racer" on one of the Insprion 3800s I mentioned above, and there were some aspects that were kind of hilarious. The game performed "okay" and never really chugged frame-rate-wise on the Rage Mobility, but fog effects were broken. It just so happened that one of the tracks is set in a kind of "cloud city" environment with no ground, the trackway is suspended in midair, and without said fog effects you got a clear view of how short the draw distance was in the game; it was pretty trippy to see the game frantically building the track right in front of you for the whole race.)