How can I adb install an apk to multiple connected devices?

Question

I have 7 devices plugged into my development machine.

Normally I do adb install and can install to just a single device.

Now

Answer 1

I was wanting to log what was happening whilst installing, also needed it to be slightly comprehendable. Ended up with:

echo "Installing app on all connected devices."

adb devices | tail -n +2 | cut -sf 1 | xargs -I % sh -c '{ \
    echo "Installing on %"; \
    adb -s % \
        install myApp.apk; \    
; }'

Tested on Linux & Mac