$300 for a retro console is ridiculous. Especially with no proven games on it or any kind of exclusive to speak of. Even in today's market with over-inflated prices for retro consoles, I could pick up a set of complete & working NES, SNES, N64, Master System, Genesis and Saturn systems for $300! Or, y'know....get a Retron 5 which also plays import games for $150. For those "not-in-the-know" about the Retron 5, it plays Game Boy/Color/Advance, NES, SNES, Master System, Genesis, Famicom and Super Famicom games with the ability to download translation patches so your import games run in English. It also has ports to accept two NES, SNES or Genesis controllers with support for those systems multitaps.
If I want something to play Android games on, I already own a Nexus Player with controller that only cost $150 for the pair and can probably be had even cheaper now.
When I really look at it, this system is ill-conceived from the get-go. The Retron benefits from using existing game cartridges from legacy systems. There is no need for developers/publishers to release new carts for it. Given how expensive cartridges are to manufacture, I don't see small indie developers making games for this thing in the day & age when everything has moved away from solid-state cartridges to disc-based media or variations of SD-cards. Not to mention the push for more and more new content to be released digital-distribution-only.
Yeah...this will never take off. Guaranteed.