For me, the problem would be, what are they going to show at E3? Lots of people, including me are looking forward to E3 and will watch most, if not all of the conferences. This is like christmas but for us who enjoys playing games.
Tell me how fun would it be watching, for example, Sonys conference if they had shown most of their stuff before E3?
In my opinion, it would be very boring to watch through Sonys conference, if they show the same stuff again, or worse talk more about stuff, instead of showing new games.
I will admit though, I won´t be watching Bethesda or Sony pressconference live because I live in Europe and will be sleeping at the time. These two I don´t mind if they release all they got before E3, as I will just watch their pressconference afterwards and just skip through the boring parts.
Ratched and Clank looks great btw.