I only payed attention to the Sony conference, I actually watched it live too. There was a few things that made me happy to see. LittleBigPlanet 3 being one of them as I love the series. It should be interesting to see where they take the new playable characters.
They also announced a Ratchet and Clank movie, which seemed interesting. While I never played the games, I've always wanted to and this movie being announced peeked my interest into the series again.
Grand Theft Auto V was also announced for PC and PS4. This does interest me because I really like GTAV and GTA Online, I just haven't played it as much as I wanted to because I have nobody to play with. With this announcement, I know I'll be playing with friends on both systems because of my gaming community, Stagger Gaming (shameless plug I know.

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I like the Batman games, so when I saw the trailer for Arkham Knight I got excited. They made Scarecrow look pretty sinister and it seems like it's going to be an enjoyable experience, just like the other games.
The last thing that really excited me. Uncharted 4: A Thief's End. I love the series and just seeing it announced is making me want to play all three PS3 games again. Nathan Drake seems to be a lot older in this game and it seems like it's going to be an emotional roller coaster of a story. I guess that's the reason why I love this series, it often feels like you're playing a movie when you watch cut scenes.