Inspiration has clearly been taken from rival products, such as Google Chrome and its snappy one-stop address bar. Internet Explorer 9’s address bar will function similarly to Chrome’s (albeit without instant search results).
Microsoft have also spent some time improving on IE8’s oft-forgotten excellent security record.
There’s way too many changes, improvements and tweaks to fit into a news story. You can get the full low-down now at DownloadSquad. They have done an excellent review of the release.