The PC-FX was made by NEC with Hudson Soft and it was the 32-bit sequel to TurboGrafx-16. It unfortunately never made sales outside Japan, but is well known amongst collectors. The PC-FX used CDs as opposed to the TG16's use of cartridges (it did have a CD peripheral though).
The unusual feature displayed in the PC-FX is its computer-like design. It stands upright like a tower computer (as seen in the image). Another feature was its 3 expansion ports.
The PC-FX was not designed to be a 3D system like most other 32-bit consoles. It more focused on FMV (Full Motion Video) and 2D graphics.
VERDICT
The popularity struggled due to the lack of games, plus the rivals being the PlayStation, Saturn and later the N64.