iCloud and Thunderbolt is the writing on the wall. HDD are the new floppy for Apple; they wont be a singe Mac with a HDD by 2015. The 17" and MacPro line will be the last to go, but go they will.
Tim Cook said last year the MacBook Air was effectively the future of computing for Apple.
Whoa. Not so fast. I am not alone in needing 750+ GB on the laptop and that much SSD storage will cost a leg and an arm - likely even in 2015. iCloud - are you joking? Tiered bandwidth pricing and caps, low broadband penetration, iCloud isn't free etc. mean that you will not store 100s of gigs of data in the cloud.