It looks underwhelming, but I am impressed Sideshow finally decided to make it happen. It is a surprising choice to go for the Halo 1 armor though. This could mean one of two things and neither of them are good:
1) They intend to do more Master Chief PF. Honestly it isn't a good thing as far as I am concerned since it will put a lot of pressure on the fans as to which to get. Waiting can be dangerous too. This one could sell out then maybe they decide not to release another so now you're stuck with nothing.
2) They don't intend to make other characters. The Halo 2 and 3 and 4 characters obviously would not fit with a Halo 1 Chief.
Let's hope for the best. But yeah they have Mass Effect, Dead Space, and Halo. They should grab Half-Life (for some reason that license is pretty popular with figures right now so it is a good time I guess), Gears of War, Uncharted, and so on.
Personally I play a lot more Japanese games than American ones so I wish they would grab the license to games like Devil May Cry, Bayonetta, and Metal Gear Solid.