Tilt-shift seems to be purveying just about every tv production at the moment, particularly documentaries and dramas.
It's a bit like the "go fast - slow right down for a second - go fast again" technique that was really popular on Top Gear etc. a few years ago. I like it at the moment and use the effect in my own photography but in years to come it will come to look so dated, it will be like watching old Top Of The Pops trails effects from the 80's.
Know what I mean?