Can't speak for BB10 itself, but you can enable an SSH server on the Blackberry Playbook (which is running QNX too). It was super easy to port my Qt app to the Playbook (Qt/QML), and I'd expect it to be even easier with BB10 now that Qt on QNX is maturing a bit (and the release of the new SDK). If they play their cards right, they can have a whole lot of Qt apps available in their store very quickly.