Would there be any interest in this? For legal reasons, you would have to supply certain elements yourself (eg ROMs). The hardware is ready for the challenge, I think, at least on the A5 devices. Playing WWF No Mercy at 960x640 (N64 ran at 25% of that), with modern graphics filters (eg. advanced texture scaling) while taking a dump would make me sooo happy. If there is enough interest, I'll open a Kickstarter fund, take investments, and start working on it.