Marketing marketing marketing, it's all about marketing. I believe Crytek/EA have spent a COLOSSAL amount of money on just marketing, probably in the 10's of millions (if not 100's)...think about it:
> Seven Wonders (the entire purpose of these is to help sales)
> Lots of long interviews with Cevat/Crytek staff,
> Tons of gameplay showcases
> Multiple trailers
All of the above are aimed at boosting pre-order, release-day sales.