There would be value in the giving of the watch, even if the watch itself didn't do much (Hawthorne and placebo effects).Mindfulness in high performance isn't a new thing, the Sydney Swans was well documented under Paul Roos to have that as part of their program.
Having said that it's good they are pushing the boundaries.
I would query how much value the apple watches really adds to the concept though.
No hill sprint jokes, please.