I'm biased since I've worked on it, but I personally find the native UI a pretty major thing.
But still I have a hard time thinking that removing many features, not improving features that have been broken for years while almost doubling the size of the download is any kind of improvement.
I wish opera would release their engine as opensource so people can take it up from there. I don't want no google/apple browser or webkit only web experience.
This is a new product so I would be _very_ suprised if they didn't limit the amount of platforms they released it initially to.