Yes, COG runs on Pi 3; no, not as an ARM64 application, nor does it generate ARM64 instructions. Yes, it could. Yes, it may well do so sometime soon; yes, one meeeeeeellion dollars.

Performance is obviously improved over the Pi2. Not completely sure as yet since I have a prototype not a production machine.

Pi 3 is still $35 plus tax/shipping/etc. See https://www.raspberrypi.org/blog/raspberry-pi-3-on-sale/ for details.

tim
--
tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
All programmers are playwrights and all computers are lousy actors.