The most visible change made this week is another one which hadn't been implemented in the original version and that's background animation on the map. This is really another reason why it was decided to move over to gdx, although possible with the original version it would have been time consuming and gdx has made it a breeze to get working.
Another change which is being worked on is adding landscape orientation support. The original version was purely portrait and adding landscape was always an afterthought but being that the UI is being rebuilt anyway, it's the perfect time to get it plumbed in.
The rest of the development has been migrating elements from the original version into the new. A slow gradual process.