Dell has announced two models of 4k screens. Above you can see the 24-inch model, which according to TechReport will retail around $1,500.
On the more expensive side, Dell also announced a 32-inch version:
The screens are each capable of displaying 60hz, so they should be suitable for use with video games and PC games alike.
TechReport also said a 28-inch, sub-$1,000 model may become available early next year.
These models should be available December 16, just in time for the holiday season.
If you're itching for a cheap 4k fix, however, Seiki makes a decent model at 30hz that can be found on Amazon for a mere $650.