Note that chat application is browser-based, thus it uses all multimedia capabilities of the browser, it follows the same browsing paradigm, it is present browsing history (as can be seen in one of the other slides), etc. etc. Yet, unlike other browser-based chats it receives native device notifications - buzz, vibration, lights - so you will never miss a thing. And of course notifications use your current notifications profile - so, do not worry - you will not add your own soundtrack to the movies :-)