I’m looking forward to the Index, and realized a feature that would add to it’s usefulness to me - muting/unmuting my bluetooth microphone during phone calls. I do low voltage work including service calls at businesses through an MSP, and sometimes I’ll be on a call for an hour or more with someone at a call center that is managing the project, but I’ll also need to talk to a manager or employee on site, etc. It’s extremely handy to be able to quickly mute and unmute calls when suddenly someone is talking to me and I don’t want to confuse the person on the phone with the side conversation.
I used to have earbuds that had it built in, and it was wonderful (but sadly the call quality of those buds was awful so I had to get different ones). I don’t know if the Index will be able to be context aware like that (to know if a phone call is active), but that would be a pretty killer feature for me.