I can certainly see the advantages of a 29er for covering big distances quickly or for xc racers riding around sterile xc courses. I'm yet to ride one that's as much fun as the 26ers when you point it downwards. I'm sure there would be a 29er out there that would be perfect for me. I fit the bill for, as I see it, a 29er. 6'4" and a big heffer who can throw a bike around.
My riding is all about fun. I'm not interested in being quicker over the same trail or route than last time and I'm not a racer. ATM the 26er market serves me well, lots of choice with the bespoke or small makers.