Is there any retro consoles that you never lived up to their potential? where the games fell short of the hardware?.
Personally I feel that the NDS was under-utilized, as it was a fully 3d capable console, that was used mostly for 2d pixel art games, and platformers. When it was able to support full 3d platformers and even a fan remake of portal.
The Atari Lynx had the graphics to blow the Game Boy out of the water. Unfortunately most of the games sucked so it died quickly.
Also, the battery life was hideously short. It would suck down a set of 6 AAs in less than 3 hours. I suspect that the CCFL backlight on the LCD screen was the culprit. And the console was huge. I have the official belt pouch and as a teen it reached most of the way down to my knee. The redesign was a bit smaller, but not much.
A lot of the games sucked, but there were some pretty good ones too. Just not enough games overall, I think.