The message I got from the ad is that Windows Phone 7 would allow you to see if you had any updates on the homescreen itself, obviating the need for fiddling with the phone for a long time to access the same information.
People don't fiddle with their phones while walking because the phones are hard to use. They fiddle because the phone is fun and addicting.
There's no desire for a phone that lets you get in and out quickly. On the contrary. If they could come up with a phone that lets you be online all the time without walking into things, they'd have a huge winner.
Everyone, seems to think that we will be able to see updates on the home screen itself, which I don't think will work.
For example email: What will I see on the homescreen? who sent the email, when it was sent? will I see a brief message on the screen? How much information will I see in a tiny box/slice/tile. I don't think I will be able to see a lot of it.
Twitter: I think, I will be able to see the last tweet. A little helpful.
Facebook updates: I think it would work same as twitter.
The user has to launch an app to get the complete information. I think its bad if MS tries to make the phone into a taskbar notification system.