Screener, the app that allows you to pop your screenshots into a device frame, has already been updated with frames for the new Google Pixel 2 and Pixel 2 XL. The update came almost immediately after Google’s big event yesterday and was a server-side push to the app so no new download or OTA update is required.
If you aren’t familiar with Screener, you’ve seen it in action on virtually every screenshot provided in posts here on the site. It allows you to take a screenshot as you normally do (Power+Volume Down) and then put it in a frame of a particular device. It gives your screenshots a much more professional look than just the screen itself.