I feel if JJ didn't kill the franchise again with his epic delay for a sequel to his landmark first feature Quinto would be willing to stay longer.
By kill I'm talking about the timing of his release for his movies. Enterprise was cancelled in 2005 which effectively killed Trek. JJ's movie debuts in 2009 and revives it. JJ's next film comes out in 2013 four years after his first. Revived the franchise just to leave stagnant for another 4 years. What's up with that? Quinto being 35 and still a young actor probably doesn't want to be portraying the same character he did in his early 30's. If JJ plans on another 4 year gap between Into Darkness and his next film.
I believe the 1st JJ Trek film is still getting plenty of exposure to the public eye.
Our neighborhood big box store keeps a rather large, double-sided display of new releases right near the entrance. It's almost 'in the way', so to speak, you cannot miss it as you enter unless you are looking at the ceiling.
Since ST09 video release they have kept at least one quarter of one side stocked with the DVD/Blu-rays. I was there last month and the stockage was down to only a few couple copies remaining and I remember thinking, like many time before when the supply was dwindling -
well that's probably going to be it, it's long exposure is probably ending. Nope. This month, as has been the case for the last 4 years, that shelf space was restocked with tens of dozens of the black and white covers shining out at me again.
It holds the record for being the 'oldest' new release on the display. Hundreds of other films have had their short time on the display and gone away forever but not ST09, it remains a hot seller.