The Last Guardian was boring to me too. It's was more so about "hey it's finally coming!!! rejoice!!" than "check this out!".
I'll go as far as to say that I enjoyed Sony's conference last year much more than this years.
I never cared about Shenmue, but even if I did, a multiplat Kick Starter shouldn't be a conference high light.
I wanted to like Last Gaurdian, but as I said before, the demonstration was putting me to sleep.
Final Fantasy 7 is a classic game, probably my 4th favorite game in the series, but it is very played out. On top of that, all they did was show 30 seconds worth of CGI and call it a day. It was a tease for a game that I don't believe will be playable for a LONG time. I wouldn't be surprised if the first trailer we see for the game is at next years E3.
Uncharted looked great, but it's like Sony's Mario at this point. I see so much of it that I never truly get hyped anymore. It does look great though, and it will certainly be one of my first purchases if I end up picking up a PS4.
Horizon Dawn actually looked really cool. It reminded me a bit of both Far Cry and Xenoblade in different ways, and those are two series that I love to death. One thing I will say is that I hope the main character doesn't speak as much in the final game, lol.