Google has quietly updated the web version of Google Drive with support for streaming presentations to Chromecast dongles. After installing the Google Cast plugin in Chrome, simply fire up a presentation in Google Drive, and click the arrow next to "Present" in the top right corner. Then choose the Chromecast you want to broadcast to from the items under "Present on other device" — simple.
So far it seems like this functionality is limited to Google Drive on the web, and only available for presentations. Though given the rate at which Chromecast's reach is expanding, we wouldn't rule out similar functionality in the Android app before long.
via: Android Police