I know .. I'll be 43(!) in March, mum asked, I told her, she said yes.  I have a Garmin VIRB Elite ANT+ video camera coming.

Why is this any funkier than my collection of GoPro Hero's?

It does power.  Last week Garmin updated the firmware in the VIRB to store power meter data.  No, this isn't a substitute for a power meter computer, I'm not replacing my Cyclops Joule 1.0's for VIRB's (at 4.5x the price!), but it does make overlaying performance data onto video a lot quicker and easier than it has been 'til now.  The old way, was to use Dashware to overlay power data onto video, but it was a messy, time consuming task.  With the new VIRB update, I can get video data much more quickly combined with power and speed, so it becomes practical to do, maybe even during a training session.  Handy?  Yes, for teaching and explaining what happens in, for example, a team sprint.  We take hand splits with stop watches, but if we have video, with power and speed, we can actually see what's really happening and make more intelligent gear choices and pacing decisions.

Same sort of thing with flying 200's and the like.  I'm excited at what I think we can do with this toy.