1. Improved browser, with faster user interface.
2. Addition of kinetic scrolling, which the browser already has, but the rest of the interface doesn't.
3. The new Omnia HD firmware should be available in January 2010, starting with the UK and then moving on with other European markets, Asia, Africa and the rest of the world.
http://www.gsmarena.com/firmware_update_for_the_samsung_i8910_omnia_hd_is_coming_soon-news-1339.php