[xaduha]

If you have nothing better to do:

1. Get a smart ring like OMNI

2. Shove a USB hub and a contactless reader into your mouse, so if on the next poll your hand with a ring isn't on it - lock it all

Seriously though, if someone would start selling mice with contactless readers built-in, I'd buy a few.

[nyuszika7h]

How would that work if you're typing on the keyboard?

[xaduha]

Configure it how you want, e.g. 3-5 minute interval should do it. I don't think I type anything for more than 5 minutes without touching a mouse, I don't use vim that much nowadays.