Typically, how often does Apple upgrade the screen resolution on the MacBook Pros? I'm hopeful that they'll improve the res for the 15" MBP whenever the refresh arrives. Are refreshes usually accompanied by resolutions improvements? If the MBP stays at 1440x900, I've already spent considerable time looking at the Sony Z--a 13" with up to 1920x 1080 res. I may get that despite it having no TRIM support for it's RAID 0 SSDs. (I like Win7 a lot, so that's not a hinderance.) Thank you.