So I need to get a laptop and I currently have a 15 inch Mac Book Pro I bought 4 years ago. I was planning on buying the newer version with retina display but when I went to the Apple store the 'genius' I talked too tried to get me to buy the Air. Is the Air really better than the MBP? I don't play video/computer games, I really use my laptop for Email/Microsoft Office/Netflix/etc. Any recommendations?