My trusty 2010 core 2 duo MBA is still chugging along fine. The only small niggle is the battery life. It has gone from about 3-4 hours when new to about 1-2 hours. If I am watching video it can not make it through a whole movie on netflix. Here is my conundrum. Looking around a battery replacements they run around $100 A refurb base model MBA is only $850 http://store.apple.com/us/product/GD760LL/B/refurbished-macbook-air-14ghz-dual-core-intel-core-i5 Unbelievably looking around I think I could still get around $450-500 if I sold my current laptop. So for around $300 I could have brand new. Only thing is I am pretty satisfied with my 2010 still. I have a specced out imac for heavy lifting, and this thing does the job fine. What are the benefits of going new? I know the obvious ones 1.Battery 2.Speed 3.Light up keyboard Anything else?