I'm looking forward to IO5 too, but I don't understand the impatience of some users.
A couple of reasons I'm impatient for "5".
Although I use a stylus more often than my fingers to type on my iPad I'm really looking forward to trying the split keypad of 5. I can see myself using it a lot if it works as good as I hope it does.
I am hoping that with 5 and iCloud that there will be even better syncing of the data between "+" applications I have on my iPad and will have ('will' as I'll be changing over to an iPhone as soon as the new one comes on sale) on my iPhone. Enter information on my iPad and a second later have it on my new iPhone without having to think about syncing it. I presume that apps will have to be updated to take advantage of these new capabilities of iOS5/iCloud.
Although there are many other new features of 5 I'm looking forward to I'll mention one more that makes me impatient for 5. Notifications! You have to admit that notifications in 4 on the iPad leave a LOT to be desired. On 5 they seem to have been greatly improved making them a feature I'm impatient to see and use.
So, yes, I am impatient for the release of iOS5!