It will be interesting to see how many people purchase this system. Since its not for sale yet, the real popularity isn't possible to estimate.
However, its definitely way more than 1000/year.
I hope they're shipping these with good C64 emulation software. That could add to the appeal.
The co-branding should significantly help in sales of the C64x especially with the network TV ads in the US as a additional layer of marketing. April should be a very interesting month for those of us who remember pre-Amiga C= days.