"Until now, there hasn't been an easy way to track activity on one and tie it to another."
I think this is happening anyway, my phone is inextricably linked to my laptop through Google. Android device, chrome browser, and Google apps that build up my data base work together to do exactly this right? h <http://arstechnica.com/tech-policy/2015/11/beware-of-ads-that-use-inaudible-sound-to-link-your-phone-tv-tablet-and-pc/>
