From the leaked screenshots back in March it was pretty clear why are they alluding to Android - Belle will introduce a pull-down notification bar, plus a back button and what seems to be a context menu key in a navigational/command strip at the bottom of the screen.
Nokia N9, which you can see in the thumbnail image above.
Additional info in the Qt guidelines is leading to speculation that the swipe-y interface of MeeGo might be applied in a form to Symbian Belle as well, so we keep our fingers crossed that the update will grace Symbian^3 devices as soon as it is finished, preferably with the new Symbian handset lineup in Q3. There is a bunch of other screenshots in the source link if you are in exploratory mood to see what is heading towards your Nokia by the end of the year.
source: Nokia via MyNokiaBlog