[noob]

Whatever is the equivalent to the Z10 when I'm ready may be my next device.

I currently use Android ( Sony Xperia Acro S and have since the original HTC Desire) because of what I use, and BB10 seems to have 85% already with a few extras I prefer.

On a regular basis I use:
SFTP server - HTTPS/FTPS/SFTP Server
File explorer with SMB FTP/SFTP built in - ES File Explorer
SSH/Telnet client - Connectbot
RDP Client - Remote RDP Lite
VNC Client - Android VNC Viewer
PDF Creator - PDF Creator Ultimate Free
Networking tools - fing, IP calculators, GTech Network Tools, wifi analyser
Video calling - Skype, Google+
Navigation - Its an android, Google of course.
Music - MP3, FLAC, A2DP bluetooth
DLNA content server to TV/PC - inbuilt client

~~

Daniel - even a dedicated instant camera for ~$150 is better than about any integrated phone + camera. They are good for getting a document if you don't have a scanner handy, or that quick photo when you didn't think to bring a proper camera. Apart from that, they are pretty rubbish.

edit - 3 photos for comparison
1.jpg from ~10 year old 'compact' Sony DSC-V1 5MP camera
2.jpg from ~4 month old phone Sony Xperia Acro S 12MP camera
3.jpg from ~5 year old compact Sony W300 13.1MP Camera
All on similar or same settings most likely fully automatic or landscape mode.