That assumes people will have a Steambox and not a 720 / PS4.
Sony are screwed on digital delivery front, they'll still have to push bluray because that's what their media industry partners and shareholders want.
Consoles have an awful lot of luggage to hulk around.
And as for Planteside 2, what's to stop people playing that on their steambox where it's free2play. Hardly the driving force for Sony console sales.
There's also Dust 514 to consider in all of this. Admittedly not a first party title, but the way it's going it'll probably release at about the time the PS4 launches, which might change things.
PSN/Steam/Origin - Ron_Justice