nanoDLP

Raspberry Pi 3 is arm8 based architecture which is backward compatible with arm6 and arm7. So no doubt nanoDLP will run on it.

Based on this post http://blog.pimoroni.com/raspberry-pi-3/. We could experience some issues.
* Image display: Despite large performance gain on speed, it is very unlikely we could have issue here.
* GPIO: Still no report of changes, but most of the previous upgrades change memory addressing, So it could have issue, but this time around is unlikely.
* Servo Motor: We use DMA for timing. Small chance of compatibility problems.

I guess there is 90% chance. It works out of box without any problem. Even if we experience problems, I do not think it will takes more than a day or two to fix.