I would love it. I would love being able to see in minute detail how much I'd improved since the last time, and if there isn't a trainer there for each individual athlete for each lift 24/7, then this works well that way. (Obviously some lifts always need a spotter, but not all). The player doesn't have to keep track of how much they lifted last time because it would all be right there. I don't think it would take much more time than having the trainer look up what they did on that lift three days previously. They would also have to find out from the trainer which lifts they need to do. So this might even take less time than it used to. And even if the signing in is annoying, all of the fun details you'd get to look at would easily make up for it.
I wish I had access to it myself. I hate trying to remember what I lifted last time or how many miles I rode. In fact... thousands of people sign up for websites just so they can log stuff like this and that probably takes a lot more time than the gadget shown in the video and it's far crappier quality.
I think they just started using it in January. Also... I realize these are excuses, but we didn't exactly have a huge group of talented players graduating, and just off-hand I'm thinking of Marcel Jones who has/had back trouble (he's one that I remember who had a really bad bench press), Lavonte who is small for his position, and Crick who had a lingering injury. I don't remember how well Dennard did. *shrug*