In Settings > Safari you can turn on -Show Tab Bar-.
If you have more than one tab open, you will see the the tabs and the (x) to close the current tab. If you only have one tab open, the bar goes away.
To see all your open tabs you can tap the new double box icon at the top right. This will show you thumbnails of all the open tabs. You can remove them by either tapping the (x) at the top left corner, or by swiping the thumbnail to the left.
If you have a Mac or another iOS device, you might be able to scroll down and see the open tabs on those devices. When it works, it makes it easy to switch from one device to another and continue browsing the same sites.
This view is also the new way to switch Private mode on/off. Or one of them, anyway. There might be others that I have not discovered yet.