The fatigue has been complicated by the fact that Obama has been battling a nasty cold, telling aides he feels like he's got an "acorn up my nose" -- an interesting turn of phrase I had never heard before but seems to mean the president is stuffed up.
But it's the live preview that will set this one apart (at least until Canon, Nikon or Sony catch up) -- and either make you rush out to buy it, or make you turn up your nose in disdain.