At E3, we got our first looks at the remastered Halo 2 Anniversary Campaign on Cairo Station, the first playable mission in the game.  At GamesCom, 343 showed off live gameplay from Delta Halo during the Xbox Press briefing and in subsequent streams throughout the week.  The remastered campaign will feature instant switching between old and new graphics running at 1080p, 60fps and have Xbox Live Co-op campaign for up to two players.

Comparisons

Bridge

Honor Guard

ODSTs

Sniper Paradise