I'm just scrubbing with the mouse in this example (it even plays back audio at the appopriate speed), but it does support connection with dedicated jog/shuttle editing devices to do pretty much anything you can imagine.

I seem to recall back in the day, TiVo had some kind of patent on being able to produce smooth trick play motion on low-end processors - and that's why all other devices, like cable boxes, looked more like a slideshow when fast forwarding. And then there was the Sony DHG HDTV DVR, which at the same time somehow managed silky smooth fast forward motion (no idea how -or if- they got around those patents).

While I'd love to see a return to the old days of jog/shuttle controls, I suspect they're the kind of "luxury" item you're not going to get in A/V these days. However, it would still be nice to get functional button-based controls, so you can play back in slow motion and frame advance.