[chrismarlow9]

the entire concept reminds me too much of iframes, embedded flash and Java applets. i can see many security problems coming with this in the future. especially if they try to make it a real window that can jump tabs and stay pinned, which seems to be what most people here would really want and an obvious next feature.

think about click jacking, address bar spoofing, and similar mosaic style hijacking. that's not even getting into potential CORS and origin spoofing potential.