E just got enlightened about the future Sony 2011 fullframe strategy. The Sony A850 will be slowly get discontinued and the price of the Sony A900 lowered. And the next Sony FF camera will probably shown as a mockup/prototype at PMA 2011.
There are a few indirect signs that the rumor is correct:
1) An official Austria Sony retailer wrote that Sony will not ship any new Sony A850 models anymore (Source: Sonyuserforum.de).
2) In US there is already a never ending instant rebate on the Sony A900 (Click here to check that on Amazon).
It’s impossible for me to check if there are rebates in all stores in all countries so feel free to check for yourself clicking on those links:
Sony A900 direct links to Amazon, B&H, Adorama, J&R, eBay.
Sony A850 direct links to Amazon, B&H, Adorama, J&R, eBay.