Ok I know stupid question but what I mean is for the general basic user what difference will they see if they buy Snow Leopard? For these people they don't have a clue what Grand Central dispatch is or what openCL is they just want a computer that does what they ask of it ( it's why they got a mac in the first place ). Will they only notice that Quicktime looks different and has a new icon and there's some new wallpapers or will they be impressed by more subtle but still obvious changes in SL. Will they notice the speed increase and will it effect the power hungry apps they use most often like iPhoto and iMovie, and will power users like myself notice changes in Aperture and Final Cut or will we have to wait for upgrades to these apps before they can use SL? Also does openCL actually make a difference to Video Encoding speeds, I know everyone has banged on about it from the start but is it being used in QT?