Hi all - apologies if this isnt the right place to post couldnt figure it out. I currently have a 2007 Macbook and waiting for the new rMBP to come out before deciding on if to purchase a MBA or a rMBP. I stream a lot of HD video via Flash (live tv channels, youtube, netflix) and at times my current macbook struggles (given the integrated intel graphics chip) however when streaming my CPU usage never maxes out - it stays at aprox 80%. Q - if i upgrade will this improve performance even though currently CPU usage isnt being maxed out? I.e how much improvement will a much improved graphics chip make to streaming flash HD video if CPU usage doesnt seem to be maxed out currently?