Yes I'm not that technical. I find for the casual user that Synaptic and and command line installs can have issues. Also often dependencies are missing which requires me to fish around for whats missing.
I think Jolicloud offers significant app installation improvements for users only experienced with Mac/Windows.
From my experience installing apps on Ubuntu sometimes and more frequently has challenges I have not experienced in windows/mac. I could see my parents using Jolicloud - I think they'd struggle on traditional Ubuntu, even though I'm a big Ubuntu fan.