I got a lot of lenses for the A mount because I felt the quality level was there with the a900, I still do. So no Nikon for me. A99 - run your eye over the feature list and it is very impressive indeed, but they aimed the camera at very different uses from mine, and they left off the most important part for me - the 36Mp sensor, on some pretext that it did not work right with video or some such. I care not for video nor for AF in general and high ISO just gives poorer images, so.....
I want to buy the sweetest camera around, the RX1; and for the system stuff wait for Sony to get over the video/flashy AF for a few lenses/low Mp game, and get on with the job for landscape people next.
Note that the RX1 is out of the Cybershot division in some kind of internal arms race inside Sony. That RX1 looks both all business, like a small camera attached to a super lens with real rings and tactile excellence, not like some dinky P&S - and has a lot going for it - an instant classic I feel, and a great offsider for any Sony DLSR - same menus, memory settings, ergo etc. How about a 36Mp one? Looking at the MTF even adjusting for the crap method of calculation, the lens will be fine, they could simply add the better sensor in both that and the A99.