This would be such a nostalgia-inducing device. I used to spend countless hours playing and writing BASIC on a Soviet clone of the original ZX Spectrum.
What I don't understand about this device, is whether it will allow for 2 players. Some of the ZX Spectrum games allowed two players, and it was lots of fun.
I couldn't not back this. Yet it's rather sad that it appears to be missing a key ingredient of the ZX series: BASIC as the OS, which taught a generation of British hackers how to code.