The Street Fighter decision is way more impactful than Tomb Raider. Tomb Raider isn't considered "top" in the adventure game field. So while although it's a big move, it's not as impactful.
What nobody realises is that between the two, The SF 5 decision is much bigger than any single game decision in itself. This is a potential genre lock in favor of Sony.
This. This. This. Anyone whose followed the fighting game community knows all major tournaments which there are alot of are primarily x360 run. Internationally its street fighter and second is ultimate marvel. Just take a quick look at shoryuken or event hubs and youll see that alot of people are switching to ps4 from xbox360. guilty gear xrd + SFV > k iller instinct
It wont win ps4 the console war but its a victory none the less and its small victories like these that add up to alot more.