Yeah it really could be a very different generation.
If I had to bet.. I'd bet PS4 is going to dominate almost as much as they did in the PS2/OG Xbox era with "core gamers" but the casual factor is still pretty up in the air.
But really.. games like Titanfall and other exclusives are going to be hard to pass up. Could also see a gen where more gamers than ever own 2 systems.
Either way I'm buying both and expecting an epic crapton of entertainment.. good times.
Way I see it....They will be pretty close. Will not be any dominating like the PS2 days. I think the PS4 will sell more, maybe like 20 million more. Mainly cause 1) I do not think MS will have such a big lead in the US, and 2) The PS4 will smash it in Japan.
I, like you, will be getting both...So we the real winners