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.
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.