First mirrorless full frame ILC cameras introduced.
I must say this much, it looks pretty damn fantastic, and the price isn't all that bad. Kinda shitty that it's E-mount and not A-Mount but it does mean that a fairly affordable adapter will be able to utilize literally any old 35mm glass to it's fullest potential (including the old school A-mount, as apparently they have an adapter for that). Sony also drops the very 90's sounding "NEX" name with this camera.
On top of that, it looks fairly simple to use without a curmudgeon of buttons and shit that you find on modern day DSLRs, and costs about the same as a 6D or D600 for the base A7, which has a 24 mpx sensor, and 600 more for the A7R which has a 36 mpx sensor and a LPF.
And for you video guys, yes... it has a headphone jack, a flippy screen, and 1080p60 (1080p24 as well).
From what I can tell, it's a pretty damn cool step, and definitely something to consider as a slightly larger option to a m4/3rds or even NEX selection. The price is pretty fair at 1700 and 2300 for the R (which is pretty damn unnecessary) and overall it looks to be a really cool camera in a sweet looking package.
Battery life will probably be garbage with this camera, due to no optical viewfinder, but other than that, shit... this is looking mighty attractive.