I don't like the share button either, but unless I've missed a few announcements (My attention for E3 was pretty much exclusively on the Konami shows), it seems like people are misinterpreting it. From what I've seen, it's a way to take screenshots/videos and either keep them or share them over social media. I despise anything related to social media, but it seems better than flat out integration. Frankly, from the various gaming communities I visit it seems that the people who are the hardcore Xbone fans like to use the share button to go "Stop focusing on the Xbox, the PS4 has THIS."
In my mind, the only real issue I see so far with the PS4 is the introduction of payed online services. But considering the average console gamer is used to getting fucked over by online fees, they'll adjust. The possibilities of the PS4 having lolnogaems is slim, since I doubt Sony would make the same mistake that they made with the PS3 again.
Also, why would you buy both? That's around $1,000 in cost, you know what you could do with it? Buy a gaming computer. Or hell, if you want something to use for movies you could buy, you know, a TV. If you want, I can also link to multiple websites and polls showing a clear preference towards the PS4 if you want. And considering the internet is primarily a place where the core, and hardcore gaming communities meet it shows what the main gaming crowd wants. This isn't counting casual, or softcore gamers but it's a pretty damn good estimate.