If it has the ability to play roms then what is the point? Meaning if that's what you want to do then just fill up a computer with roms and hook it up to your TV. Same thing.
I did this for a few years when I had first sold off my original TG16 collection. It ended up getting boring fast because I didn't own the actual game or system anymore. Meaning I would flip from game to game never giving it much time because whenever I wanted to I could just pick another one.
I feel the same way about emulation.
Me, I'd just want a low powered portable SGX on a chip that takes hueys.