I had the best introduction to the original Halo. My auntie and uncle, who were decidedly more wealthy than my rents and who everyone converged on for holidays due to the size of their house, had recently gotten a new 42" Plasma when they were just about as cheap as a Nasa Space Shuttle, and plugged into it was an Xbox with Halo and a 5.1 home cinema system.
Blew my fucking hair off. Unfortunately I've never been introduced to another game in such a great way and thus many haven't stuck with me the way they perhaps should have (Half Life 2 excepted because that was just far, far too good). More unfortunate is none of the subsequent Halo's ever living up to the first.
Though I doubt given how review sites score cookie cutter games like Call of Duty this will be in any way revolutionary, if it sparks enough nostalgia I'm sure it will be worth a purchase.