I just have found that it is possible to make Ubuntu phone screenshots in the same way (by pressing volume up and volume down simultaneously) both on the phone screen and the external screen (if available). So there is one example:
I use a Lenovo bluetooth keyboard with the device without problems. The Alt+Tab works and one can have several windows visible at once.
The convergence feature is still in the development. There are things that I miss the most:
- Configurable external keyboard layout.
- Configuration of font sizes (or, at least, DPI settings) for the external screen.
- Working cope and paste (Ctrl+C, Ctrl+V at least).
- XMir preinstalled.