Games is what will win me over. While I think that the PS4 hardware looks amazing, the games they have shown so far are not very interesting to me. If Microsoft wants to make an impression they really needs to show some games that are further along in production that are new and exciting.
Oh well. I don't have high expectations for MS but I'll give em a fair chance. Especially if Sony puts normal online play behind paywall MS has a big shot. I just feel that both companies save the best event for E3.