The biggest boon this year is when the floodgates open on the cross-platform titles. The vast majority of them will look better on the PS4, and we live in a social-media instant-access world. Month after month we'll have people constantly confronted with the fact that the PS4 just plays those games better.
I'd even go so far as to say that the cross-platform games will help PS4 more than their exclusives like MLB The Show, because people that read reviews and see the screenshots will be able to really see what they're investing in.
Remember, most people have NOT bought a next-gen console yet, but when you see that one system dominantly offers better multi-platform performance, I can see the gap widening even more than it is right now.