iOS was a revelation in 2007 but it seems to have stalled since then. The static grid of information-free tiles and clunky task management are starting to feel downright archaic even compared to Android and their decent into cheap skeuomorphism continues unabated.
Apple is lucky Google is having so much trouble getting ICS out there.
On the flip side both the iPhone and iPad have amazing customer satisfaction numbers so we can probably conclude that most iOS users like things the way they are. Why would Apple want to change it up too much? If live tiles or better task management were important we'd all be using WP7 or WebOS.
Sure, it shows how far ahead of the game Apple was in 2007.
But they've left the door open for competitors, in my opinion. If Google had the distribution issues plaguing ICS sorted out they would be in trouble, IMO, particularly because the iOS UI conventions are more awkward on tablets and that's currently Apple's stronghold.
Apple is lucky Google is having so much trouble getting ICS out there.