Popped into an Apple store today. Damn, that MBPwR screen is nice... and so at every resolution (reportedly doubled and then scaled). Previously wondered is non-ideal settings would be a step back. No. Can see jumping between settings throughout the day as needed (long text reading v. application windows and max real estate, etc.). I suppose if you already had a new iPad (I don't), you could use it when you need this crispness for at least the text, but after five minutes it's hard for me to believe anyone who had one of these could easily go back. I didn't spend any time looking for scaled apps that reportedly look poor, but reading was such a joy on NYTimes, etc.