A lot of what they're showing off (in terms of design) has been similarly implemented in OS X (through iTunes, iPhone, etc.) and it's been very successful.
How has it not worked in the past and why don't you think they can pull it off?
Does anyone have any data on the number of normal users vs power users that Gnome actually has? The worry has to be that, if Gnome stops targeting "people who tend to use Linux" then there's a strong chance that they'll fail to attract enough "normal computer users" to make it worthwhile.
How has it not worked in the past and why don't you think they can pull it off?