I have a garmin watch and one wonderful thing it does is show me my resting heart rate, which is a nice indication of my level of fitness (and correlates with good sleep, sickness, etc)

It also does nice things like a detailed check of my sleep, how I'm acclimatizing to altitude when visiting the mountains, the number of steps I walked and pulse-ox.

I don't know how these correlate to what blood pressure tells you, but I blood pressure will be directly measured in the same way in a few years.