Why not?

It still needs a real keyboard matching the case holes.

That's coming http://www.breadbox64.com/blog/c64-keyboard-prototype/

If Phase 5 would deliver the replacement keycaps from their crowdfunded campaign three years ago we'd be able to do these conversions without touching a real 64. I haven't given up hope -- the machinery and molds are being moved to a company that specializes in this kind of low-volume production.

This is amazing.

Maybe with these we could finally build the Commodore 256 ;-)

Would you settle for a Commodore 65 clone with a 50MHz processor, 800x600 video @ 8.3 million colors, Ethernet, etc.? http://mega65.org/

I would still like to design a 64-bit 65064 processor.