Such people (if they really exist) will be able to change the UI to match their workflow. I managed it and I'm just an end user.

dwm/dmenu or similar, or xmonad for the adventurous. Sysadmin people might prefer icewm as it is tiny and can tile 12 terminal windows easily!

Ubuntu with default Unity is aiming at a wide market here. Having i7 small form factor PCs available with hardware chosen to run a GNU/Linux is good!