2k-4k @ 24fps on a Canon HDSLR?

Either a stunning breakthrough, or a stunning hoax.
Chris and Trish Meyer

HDSLR guru Philip Bloom did an excellent job of summarizing the very intriguing promise of a firmware hack that claims to coax a Canon 55D/T2i into capturing 2k, 3k, or 4k video at 24 fps or 1080p at 60 fps - with a 5D mkII version to follow soon thereafter (and possibly 60D and 7D as well). There are all sorts of caveats - such as only a few memory cards being currently qualified, 4k limited to 6 seconds of capture (3k to 32 seconds, and 2k to 91 seconds), and certain heat issues - but it just goes to show what may be possible with real products in the not-too-distant future. In addition to Philip's blog post already linked above, here is a summary by the folks at Video-DSLR (including an audio recording of the "press conference"), while below is a teaser YouTube piece about the hack:

I guess we'll have to wait a few more days to see if pigs can fly, or if April 1 came four months early this year...