I bought a lamp recently, and kept the box. It's a big, bulky box, but it had the important bit - what wattage bulb it takes. 
An idea struck me. Before I threw the box out, I took a snap of it with the built-in camera on my laptop, uploaded the result to Flickr as a private photo. Then I took the URL of the Flickr photo and shortened it with a URL shortening service, scribbled down the shortened URL on a modified post-it note (just the sticky bit of the paper cut off). I wrote "Desk lamp" followed by the URL.
Then I stuck it on the wall right next to the desk lamp. Next time I need a bulb, I can always look back at the box in all of ten keystrokes.
Eventually, manufacturers will give each product a permanent URL. I'll be able to put that URL in my phone to call them, in my computer to view information about them, or in my 'agent' to track changes to that product (based on a pre-set criteria).
QR Tags are, of course, a progression from this. I'm not using them because (shame) my phone doesn't support reading them.
Everything will have a URI. Yes, even my desk lamp. URIs are easier to shift around than physical objects.
