A bunch of fresh images from Halo 4 just appeared on NeoGAF, and they certainly seem to show the game from its best side. Most of them are from the multiplayer component of the game, but the last three appear to be taken from the campaign.
"343's proved worthy stewards of the franchise, and its the biggest commendation we can give is that we're eager to see them developing their own spin on the Halo universe."