Lots of skepticism for this thing here. It's been shown in person running at a gaming expo in California, the photoshopped controller and all. I'm personally excited about this project. Yes, I can use my Shield TV to emulate all consoles up to N64/PS1 and even Dreamcast (same Nvidia X1 chip that's in the Nintendo Switch) but there's something about pushing a cartridge into a slot that just makes it different to me, purely a mental thing. I also have a SNES that gets upscaled via my AVR (Yamaha Aventage RX-A1020) and I've been planning on a Genesis but I'd be happy to have so many consoles wrapped in one package where I can just swap modules off my shelf for different systems. The older optical systems are not going to last as long as the cartridge based systems either.
If it comes to fruition, great! I'll get one. If not, oh well. I'm pretty hopeful about it though. Way more hopeful than the I was about the Coleco Chameleon. The only thing giving me a bit of pause so far is the lack of info on how they're going about the requirement for a BIOS for the optical systems.