The Pondering Primate outlines a presentation on the physical world connection:
A physical world hyperlink (PWH) allows any physical object to be linked directly through and to the Internet, to specific content/info/URL when accessed with a specific tools.
PWHs already exist and there are trillions of them.
A Physical World Identifier is/can be:
A barcode (UPC/EAN, Code 128)
2d code (data matrix, QR code)
RFID tag (many forms)
Many others to come.
They will require a different browser, or tool, but this tool will be mobiles search engine.