[hotphil]

Automobile unlock/engine start.

[wps81]

I want music control when I am playing music on phone.

[Michael Hansen]

I was just thinking about this 10 mins ago.

[Warren Dean]

Screen orientation adjustment. My band fits my wrist better when I wear it "upside down". And allow a portrait orientation as well to make wearing it on top easier to read.

[Pricey_2k]

- Wrist flick to turn on watch mode; basically keep the display off until you flick your wrist. A feature on the basis B1 that I loved. Would save battery
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I really like this idea, or even if you have watch mode turned off and pressed the action button once it brought up the time. Currently you have two options, save battery life by leaving Watch Mode off and then scrolling to the time if you left the watch on a different screen or have watch mode always on which uses battery...

[Marcia Tremmel]

There are some great suggestions here. I would like to see a tile for the elliptical or stairclimber (close - the same math would probably work). That's my favorite indoor exercise.

I also vote for being able to see the battery level number instead of the little icon.

[8and]

This would take the Band in a different direction, but I wanted to post this suggestion somewhere...
I would love to see someone make a 2-part smart watch. Picture something like the 2nd generation Moto 360 for the primary part and the 1st generation Jawbone as the secondary part.
I want a smart watch that looks great (face that I can change, leather strap, metal case/bezel), that I can take off when I want to exercise. Maybe the two pieces would attach at the band with a series of magnets. The secondary part would be durable and contain just enough electronics to tell me how many steps I've taken and the current time. I don't care about anything else when I'm exercising.

[gadgetrants]

Welcome 8and -- aka visitor from the future! LOL What you describe sounds very, very cool. And pretty plausible, given the emerging concept of modular cell-phone design: Project Ara: Everything we know about Google's modular phone - CNET

Wouldn't surprise me at all if the 4th or 5th gen activity-trackers and smart watches merge into something just like you're describing.

-Matt