Everyone needs to post on other forums about PS4 and tell non gamers why its the best.
The problem is millions of xbox ones will be sold to moms, dads, grandmas, people just getting into gaming and so on who aren't that informed or knowledgeable about them. "Oh timmy loved his xbox 360, I should get him this new xbox for Christmas"
Sony still has an uphill battle because Microsoft has a bottomless pit for advertising dollars and they will reach millions of have no idea what they are getting.
I want as many gamers on PS4 as possible because that means it will have a larger community. More players means more support from game developers and publishers which means more games, more people to play with online on PS4, and so on.
So if you see someone asking questions or talking about new systems on other forums respond. Hit up yahoo answers if you see someone asking about new systems. Friend that isn't a gamer? Tell them about it. Hell, send an email to your favorite publisher and developer telling them you are buying and supporting Sony so they see where we stand.
We need to give Sony a hand and do some grass roots marketing for them and help them with a little push in the coming months till the system comes out because you know MS will be marketing the hell out of Xbone and will reach a lot of people sony doesn't. So don't let up and let the PS4 excitement fizzle just because e3 is over.