True, but I think it's important to differentiate between "running QBs" and "mobile" QBs. Rodgers and BR both are forced to scramble for their lives once on every series because their lines suck. I think they still both fit under the umbrella of pocket passer. As does Brady, Manning, Brees, Rivers, Schaub, Ryan, Flacco etc.
I'm not sure if I agree there's a trend where running QBs will be the norm. McNabb played his best ball when he learned to be a pocket passer. Vick was lauded this year not for his running, but for becoming a better passer with vision and a reluctance to take off after going through his first read.