So, like VO2max for Trail Running, the "Ultra Run" activity is a feature announced in the Enduro that is supposed to come to the 945 as well. I've no idea if it will be packaged with the Vo2max Trail option (which DCRainmaker says we can expect "before swimsuit season") or if it will be a separate option.
I'm not quite sure what to make of the big feature in this app, that being the "rest timer" as I typically am not a "watch stopper" even in training, much less in a race. So, I might decide to try it out, provided it doesn't monkey with my lap settings.