Hello! I am going to purchase the high end 15" MBP, and I was just wondering if anyone can comment on how futureproof the machine will be. Please do note that this is going to be my first mac machine, so I am completely oblivious to the pattern of system requirement changes that Mac softwares run through. I am looking for this machine to last at least 3-4 years, without getting obsolete. Am I hoping for too much? Thanks a lot!