Now that's kind of tough.
Microsoft had it's timed exclusive DLC line-up, that might generate a few sales with Dragon Age but especially CoD. I don't see Sunset Overdrive being especially impressive at the box office, so to speak. The Master Chief Collection will sell but I think it will sell to existing Microsoft fans. It's not a huge XO system seller but will have an impact. I know I want it.
Crackdown and Scalebound won't really propel the console to the next level, either. I think Platinum is the most overrated studio out there, to be honest.
I'm just not seeing a big boost in units anywhere in that line-up, though that could change if that The Division exclusive content is substantial.
Sony showed a teaser for Uncharted 4, which will sell consoles. That, I think, already puts them above Microsoft's E3 in terms of generating sales. Bloodborne might be a sleeper hit like Demon's Souls but it's too soon to tell. Same with The Order. LBP3 will be good for fans of the series, though I think they're already on the Playstation train.
Destiny will be bloody massive and the PS4 might really benefit from hitching it's wagon to it. If people buy into the idea that it's much better on the PS4, that would be a real advantage.
Sony really had a lot of "exclusive content" stuff all over the place, like the Scarecrow stuff for Batman and the (nifty) Far Cry 4 co-op thing. None of it is massive on its own but it could add up in the collective unconscious of gamerdom.
Nintendo had Zelda, which will have a glorious tie-in ratio. I don't see much else that will sell consoles, aside from Smash, unless they score big with kids on that toy thing--which I kind of doubt. They also had an entire herd of stuff that will only sell to existing Wii U owners.
From a sales perspective, I think Sony clearly came out ahead. Kind of crazy, really, when you consider that they were the least desperate. I'm extremely shocked at Microsoft not pulling out ALL the stops and spending a few more billion to win E3.