It's not just mum. When the animator who made the actual promo video has trouble showing this as a positive thing, you know there's something wrong.
Look at this wonderful Tetris-like game that will lead to vast acreage of empty space you have to scroll past:
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If the people trying to show this in the best possible light even have trouble, imagine just how poorly "mum" will do.
I'm not opposed to widgets, but some thought has to go into how people will use them. This system seems to prioritize "looking cool" over any sort of usability.
Another example:
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Look, I hope the iPhone does add widgets and all sorts of other cool new things. I don't want it to stay the same forever any more than you do. But drooling over this doofy design just because it has those things added in a silly way doesn't help. I'd rather wish for them to be added in a useful way.
Totally agree with you.