I saw Beck perform in the old Lowes Theater in Jersey City about 1.5 ago. He really put on a great show. He did a lot of older and newer stuff and did encores. My wife and I really enjoyed the show.
Like above poster mentioned, he re-jiggered he songs to be a bit different live, not a whole lot but enough to give them a bit different flavor. I like it when artists do that so long as they don't kill the musicality of the original. Nine Inch Nails back in the heyday did that too, usually opting to make it a bit harder metally live.