(Skype is rarely used in professional markets)
I also think people are underestimating the Iphone as competition. Apple claims "real internet" that is easy to use on a mobile device. That is exactly the main selling point for the Internet tablets for most (non-hacking) consumers. If it really works as well as they claim, than nokia will need to improve the IT platform really fast, or end up losing a LOT of customers.
I don't really care what browser is used on the IT platform. But if they change it to a Nokia Webkit based one they sure as hell need to debug it REALLY well. Opera is currently working well (not great, but well), and is relatively stable on IT (it sometimes crashes, but not often). Considering the buggy state and bad UI of a lot of the other application (google talk, RSS reader, email) on the platform, I would think REALLY hard before I would ditch the best application on the system.