Are QR Codes the historical markers of the future and has the future already arrived?

My proposal involves the creation and use of QR Codes to enable visitors at an historical site or museum to easily access an on-line historical resource, such as a related blog post, a Wikipedia article, or a smartphone app that enables users to explore additional digital content.

This QR Code (generated by the RedLaser Classic app) will link your mobile device to Lower Scioto Blog and my recent post on Picnic Point, a scenic overlook in Ohio's Shawnee State Forest.

I imagine that this session could fall under the genre of a “general discussion.” First off, let me say, I only yesterday figured out how to create QR codes on my iPhone (see the code on the left) and besides an NPR story about the use of QR codes on headstones for on-line memorials, I’ve not heard or read about how QR codes are being used in public history projects.  I’m just interested in learning more and thinking creatively about what uses QR codes can be put to in the practice of digital history.

To illustrate a possible use, imagine that you are in an art gallery, which is exhibiting documentary images of local points of interest in your community.  Next to one set of images, affixed to the wall, is a QR code directing any interested party who happens to have a smartphone to a historical blog or some other digital resource about the documented historical site.  Imagine physically imbedding QR codes on signs at historical sites.  Imagine QR codes as modern-day historical markers.

Perhaps a general discussion of the possible uses of QR code and GPS mapping technology in the marking of historical sites could be the topic of general discussion?