why?
Unity is rubbish in my opinion. Ubuntu is going it's own road which I don't want to go down. It's breaking away...
Good luck to them but It's not what I want.
Why are you making the move to linux and only considering Ubuntu?
You should try opensuse, debian, mint, arch, pclinuxos, mandriva, fedora, centOS, Sabayon etc etc...
You decide what suits you best, thats the power of linux.
For me Ubuntu is a train wreck. I also wouldn't tell someone to go ubuntu I merely list all the top10 userfriendly distros. It's up the the individual to trial them.
Hell how do you even know which Desktop Environment you will find most productive?
You got openbox, XFCE, LXDE, KDE 3, KDE4, Gnome2, Gnome 3 among many others...