Will we see 4k resolution for video in DSLR's soon?

4k resolution is 4096x2160 pixels for those who don't know. Physically, the sensors in DSLR already have more pixels than this. And in terms of hardware, DSLR's can record around 12 minutes of Full HD so they should be able to record 2 1/2 minutes of 4k. This doesn't sound like a lot but it would be great for a short film. Do you think this feature will come any time soon?