Good question. My points:

- Great multitasking implementation (better than Android and WP7). UI as smooth as iOS (hopefully).
- No buttons on the front :-)
- Good development tools with Qt SDK.
- Limited to high-end hardware. Means less fragmentation.
- Nokia likely to be the only manufacturer in the beginning (similar to apple).
Cited as a disadvantage by many, but also limits the amount of different hardware used and therefore fragmentation, which is good.
- Nokia Hardware with nice design and great cameras.
- Nokia brand.
- Ovi Maps.

Why I am still skeptical:

Lack of commitment by nokia. Qt everywhere sounds nice (and will work for most things) but the UI and hardware requirements still have to be tweaked for symbian/maemo seperately.
Nokia needs to sell a lot of meego devices, which they will if they want to.