Kinetic Scrolling, Enhanced Homescreen, Camera Improvements ! that's what a Nokia product manager confirms when it was asked about a new 5800's firmware update, there is one in testing stage, which will include kinetic scrolling (like the N97 and the upcoming 5530), enhanced homescreen (like the 5530 and not like the one found on the n97) , and better camera results.

But hey, They'd have to release the Nokia 5530 first before anything else, so don't expect this update to be released before that ^^

Source : Dailymobile