Chrome 42 for iOS brought a lot of new features. Some of them use the APIs introduced in iOS 8, while others make it easy to use Apple's bigger phones.
You can now reload a page, open a new tab or close a tab with one swipe. Go to the top of a page, pull down and you'll see three buttons: a reload button (pull straight down), a plus button for opening a new tab (pull down and left) and a button that closes the current tab (pull down and right).
Chrome for iOS 8 now has support for the Today View. You can open a new tab, use voice search or open copied links. For example, you can copy a link from Safari, open the Notification Center and tap "open copied link" to open the page in Chrome.
Chrome has its own app extension for the Today View, but it also supports third-party app extensions. For example, you can now use password managers like LastPass and 1Password right inside Chrome. Here are the instructions for LastPass. Basically, you need to tap the share button from Chrome's menu, enable LastPass in the extensions menu and then you can quickly log in using LastPass.
Another new feature allows you find answers more quickly. When you're searching from the address bar, Chrome now shows answers related to weather, stocks, unit conversions and more. Chrome also shows the latest URL copied to the clipboard.