While I think something like this makes sense, the pricing seems off. For $600 you can build a PC with a desktop GPU. If you want to make it easy to set up, you could just use an off the shelf mini-PC and preinstall everything so a non-technical user can get started without any hassle. I really hope we’ll see more Steam machine like devices in the future.
You can see the planned specs for the two different models on their indiegogo page: https://www.indiegogo.com/projects/emudeck-machines-retro-emulation-console-pc#/
I’m guessing they have a pre-selected all-in-one board (designed for mobile devices) and they’re just designing a chassis around it. There’s still a lot that could go wrong, but it’s a bit more achievable than actually designing, testing and assembling your own board.