I agree, I didn't mean it will have zero support, just no support from MS. MS can't control the third party. They will likely move on to the next generation.
I think the installbase of 70 m is too big to ignore for third parties, a quick port and probably about 100-200k will justify the porting costs and some profit on top. What I don't see is anymore first party games coming similar in the case of PS3 exclusives not making an appearance on PS2.
Bottom line is, 3rd parties will make the games for the next gen and will make crappy ports for X360 and PS3 like PS2, see World At War, Fifas etc.
Disconnect and self destruct, one bullet a time.