Be more secure. Maintain itself. Cost nothing. Not lose your data when it crashes or is reinstalled. Not require any installations or upgrades for any software you use, ever.
Limits to some of us are freedom to others. It all depends on perspective.
I really do think you are missing the point mainly due to being a power user / hacker. A lot of my friends who are casual computer users a) have netbooks and b) are a perfect target market for this.
Some are already asking me about Chrome OS with interest.
Try to think of it as if your a joe user with little technical knowledge.
