change how? bd is already out. there might be software patches that help bd perform better. windows 8.0 makes better use of bd's hardware and shows marginal (max 10%) improvements as seen in the unofficial tests using the pre-release beta. read the bulldozer review
on tom's and you'll get an idea. by the time the new version on bulldozer comes out ( if
it comes out in time) it'll have to compete with intel's new cpu - ivy bridge.
right now the fx 8150 performs poorly in lightly threaded tasks and in gaming. it does perform well in heavily multithreaded applications, encryptions etc.