Glome explained by developers:
On a single computer the effect of Glome is pretty similar to cookies: the user gets an identifier in the background, but doesn't necessarily know about it. The difference kicks in when the user wants to continue later on a different device. Please note that it is the responsibility of your application to make sure that the user moves an identifying token to the other device, for example by emailing a link. Thus, the multi-device browsing experience requires an explicit action from your user; she is in control, Glome just makes it easy.