I have the 1020 and just used my upgrade for the Galaxy s5. Using both but my 1020 is collecting dust. The app gap is real and the interesting thing is msft has made it very easy to switch. With services being on android you don't miss anything. Xbox music. outlook, skype, onedrive,lync,onenote all work great on android. Battery life is amazing a full day with Bluetooth on connected to my smart watch (Samsung neo 2) and I am down to about 50-60%
Camera is still not 1020 standards but great in day time scenarios just night time it sucks.
The smart watch deal on wp needs to be sorted QUICK. I love my watch has 4gb storage and connects to my Bluetooth headset so I don't need my phone for music and running etc
That's whats stopping me using my 1020 as much. Will get the next wp high end device just needs to happen fast.