I'm thinking about selling my 2011 15" MBP for an all new 13" MBA Ultimate since they got the performance gain yesterday. I am going to be a software development student in autumn. Will the new MBA suit my needs? Additionally I would use it for image editing, general media and some very light gaming. Is the 13" screen a pain to work long hours on it compared to the 15" Hi-Res? Is it powerful enough? I really like the small form factor and "airness" of the MBA and I could get some money out in between....Thanks for your fast help!