There are several features aready present on the n950 which i didn't expect or which required 3rd party tools on maemo5.

First of all: The exchange integration is great. I was sitting in the car with both my n900 and the n950 and was ask to invite several people to a meeting. I knew the n900 can't do that. But to my surprise the n950 can. Just create a meeting appointment, add people from your contacts list and hit "send" ...

The second nice things is that you can set schedules for email download. This allows to e.g. keep the phone silent in the night.

And last but not least: The phone can keep an eye on the transfer volume and can e,g, warn you if you exceed a certain limit.

I am sure others have also noticed nice and surprising things.