Yep, but still it shows what is
possible with a good amount of machine code. It is similar to what demo groups later have achieved on other platforms; often you can create much more awesome presentations if you don't have to bother with user input and arbitrary "scenarios". The JR-200 in some ways reminds me both about the vTech Laser-110/220 (?) and the COMX-35 (of which I recently acquired one).
A few other true oddballs to look for would be the BIT Corporation
BIT-60 (Atari 2600 compatible?) and
BIT-90 (ColecoVision/Sega SC-3000 compatible?). In particular the first one, there were very few el-cheapo home computers powered by a 6502. With Atari already in the computer business, it probably was to avoid competing with themselves they never made a real computer out of the VCS, even if there are 3rd party keyboards, tape storage systems et.al.