Red Digital Cinema, creators of the Red One 4k camera, is profiled in Wired magazine this month. The Red One is an amazing piece of tech (though the post workflow is still continually evolving), and this piece by Michael Behar goes a long way in explaining why. Though John Gruber puts it more succinctly:

[The] Red One movie camera is, dollar-for-dollar, the best and most amazing camera in the world. It sells for $17,500 — but if you think that sounds expensive, consider that the equivalent film camera rents for $25,000 per month...