This product solves a problem no one has! Fail fast and iterate fast!
Seriously, who the hell ever said, "Damn, as much as I love my iPad, the problem of an integrated touch screen and lack of mouse really annoy me! What I want is a PC and mouse without a screen!" Said no-one. Ever.
Home PC? No, I want more power to play games.
Autonomous (like HTPC, IoT, etc)? I don't want a mouse.
Office? More power.
Mobility? It needs a monitor.
So what's the use case?
Edit: some additions and clarifications