I found the marketing to be very concise. Small device, games preloaded, make your own games. While the points you make may be important to you, I don't think they're the key selling points of such a device.

Nice tip thanks :) I added it to the buy-now page: https://www.arduboy.com/buy-now

It's not really about playing games. The project seems to target people who want to learn microcontroller programming with a fun interface. Sure you can load community games on but that seems a lot less fun than making your own since the display and microcontroller are so limited you aren't getting much on there.