I can't imagine many people who do not have a PS3 but assuming someone has never purchased one that would be a great way to enter this generation and have a years worth of games to play with the PS+ subscription to see if they like it.
I don't have a PS3, but was definitely planning on getting one soon. I have two 360s (the second came free with my TV last year). This year I got a Vita and have had PS+ solely for the free vita games since Christmas. I started downloading the free games for PS3 a few months ago anyways, just thinking about it. So I already have a small library for a system I don't even own. I was planning on getting the God of War PS3 Bundle after E3, hoping for another price drop. I've never played a God of War game, and have always wanted to (I enjoyed Dante's Inferno, which everyone complained was a GOW ripoff). So I think the GOW bundle is better for me than the GT5 Infamous bundle (especially if I already have an infamous game from PS+)