This doesn't actually appear to be new; at least not that I can tell. Google Cloud has supported being able to open an SSH session to any of your instances right from the browser for awhile. I've found it to be a killer feature and am really surprised Amazon Web Services does not offer the same thing.
https://chrome.google.com/webstore/detail/secure-shell/pnhec...
I use it every day. Easily access any SSH server from the browser.