The Operators' Cut
No-one has picked up on this sentence in the original article:
"The ability to sell Microsoft and Nokia applications and content through the operator portal – driven from a central Nokia/Microsoft-run database – is exactly what they want."
Historically the operators demanded their pound of flesh, and then some, as a cut from developers selling applications through their portals. Apple's App Store changed all this, and I suspect that's rather upset people running the networks, particularly as they're missing out on revenue that they see as being rightfully theirs.
But that begs a question: Are developers going to write for a platform that gives them 70% of the gross, or one that gives them much less? (I've heard rumours of 10% rates for developers in the past.)
If app sales are an important part of the "ecosystem", then Microsoft and Nokia are going to have difficulty attracting developers if it becomes even harder for them to make a living. That could slow adoption.