xbox 360 kinect update

if i update,how about my current and old game?can still play even ap2.5 block the AC:bro/fable etc.?

in a easy word,it just change ur dashboard fimware and block the game title as mention above only?
how about another game that will release soon?

thanks....

really want to upgrade but might to ask pro here first

You still can play other's non AP 2.5 games. Best is to get ur firmware flashed and updated to play AP 2.5 games.