This is an experimental feature in Canary which I stumbled upon while checking the DevTools source code. Consider this an unofficial sneak peak.
While this was being worked on recently, I don't know if it will ship as a real feature.
DevTools has a partially working built-in terminal. It hooks into your existing terminal environment so you keep access to your usual settings, for example aliases. The workflows this could enable (e.g. starting and stopping web servers all within the browser) are quite interesting.
Update: Network requests on the Timeline Panel is in Chrome Stable!