its not a picture hanging there like iphone's safari, each card is live and running! inside the card! shape might be similar, but there aren't many stuff out on the computer that isn't square....
not to mention, what is the biggest advantage of multi-tasking? you can work on net, IM, email, office, music, simultaneously! switch between them, absolutely no interruption of each other's flow. Try that on your iphone, or your mobile safari.
Glorified webpages? no, I should say iPhone itself is just a glorified apple launcher. just like the concept in treo by palm 7 years ago. Now thats a more proper comparison.
Get a computer. Obviously your not a iphone type of person.
I don't see why you have to bash the iphone. If the iphone didn't exist I am pretty sure the pre wouldn't have all these 'amazing' features to begin with.
Heck if you multitask heavily on your computer using the stock ram that it came with, your computer would become laggy right? Now imagine this on a cellphone for crying outloud...Even with multitasking, you don't need your email constantly on 24/7 while using IM, that doesn't make sense.
If you need a phone for 'office' (w/e) then you still have to wait because we don't know what type of apps it might have for office use, so your best bet is a computer again.
For music obviously the iphone is the winner here...
We also don't know how well the accelorameter (idc about how its spelled) will work or how responsive the touchscreen will be. I can say that the iphone really does have the best touchscreen and accelorameter, because when you use it you don't get complete lagginess everytime and its so smooth when you use it it feels almost like water. If you really need a music device then just get a zune since you might bash ipods as well for being 4x the money it takes to make them....god...
Just wait and see how the pre turns out, it may be a very good phone but end up being forgotten overtime, like the G1 which could have been good as well, it has a very good interface.
Also I have tried backrounding apps on the iphone and it doesn't run as crappy but I make sure not to run too may apps in the backround, as you would do with any phone. Since the pre would be using simple web apps, then it would just be pretty much like the browser, hence you would be using just one application instead of many, which you can do on the iphone very well (safari has meebo on, yahoo mail and any other site).
Don't forget, the Pre is on sprint

other carriers a maybe but for now they are dead in there tracks.