The search bar has been upgraded in many ways. Depending on the browser and device you are using to view the site, you may see a few differences but in all cases the results you get will be better formed. The search functionality has been expanded, to include more listings and has more understanding of your search. Make sure you use commas to separate multiple word terms.
In the picture, you will see how it looks on a desktop PC. There is a datalist that currently shows, counties, countries, regions, categories and category groups. When you start typing it will give some suggestions, you can add to these or just use your own search. In addition, it you have already done a search, it can remember it for the future.
There is now a search button that you can press if using a mouse, as well as the enter button.