I think Boeing is going in a different direction. The 7E7 is not that large - it is efficient - uses less fuel. The plus side is wider aisles and seats, better tempature and air quality, internet connectivity while in the air.
I do not think I would like to try to get on a plane that holds 800, then disembark with 800 -- and then wait for baggage (Thats a lot of bags).
I would go for more comfort and 225 people.
Where is the Big Kahuna??? Paging Northwest Airlines!!! note: This is in referance to Tony's post before.