think they're a fad and will not really catch on, at least for what we do. if i'm say looking for a builder, get a leaflet through, i'm not thinking hmm i want to read their website so will wipe out my smartphone and struggle to see it. however there is potential for other uses like putting it on products like someone has mentioned above, which still i can't see getting used much tbh, and especially any time soon.
they are also on vans i notice, who really thinks the customer will be walking down the street, think christ i need my carpets cleaned, rather then take the number and call the number, they will go onto the website, and do what i don't know whilst in the street, and then call?