Electric Garden in London is bringing billboards to the next level – but could smart glasses make them even more exciting and useful in future? (Image credit: Electric Garden)

Did you ever see the 2021 Leonardo DiCaprio film Don't Look Up? I don't think it's a spoiler to say that its focus on people not looking up was partly a satire on climate change denial. But more broadly, it fed into the idea that nowadays, we're all looking down a lot; specifically at our phones.

I've honestly got no idea if smart glasses – some of which can now project information, images and videos straight at your eyeballs – will end up taking off in future, and replacing the smartphone. But if they do, then it occurs to me that this will be big news for billboards.

You might assume that if more digital tech catches on, physical advertising would be one of the casualties. After all, why look at a poster when your glasses can show you something tailored?…