Further to the official discontinuation of the A850 back to May, now Sony has announced the discontinuation of the A900:-
http://www.sony.jp/ichigan/products/DSLR-A900/
See the Japanese words "生産完了" which just means "discontinued".
And a glance to the current Sony SLT/SLR lineup reveals that the A900 is actually the last Sony SLR that has been discontinued, which implies that Sony will have no DSLR in their lineup, at least in the meantime, and the future is yet unknown.