A company called Lightvert is experimenting with the future of digital advertisements It has developed technology can produce images that appear to be 200m (656ft) high, but which only exist in the eye of the viewer for a fraction of a second. So could we be on the verge of seeing giant digital ads in our cities, similar to those featured in the seminal 1982 sci-fi film Blade Runner? He is hoping that landlords will grab the opportunity to turn their buildings into revenue-generating digital billboards that are huge, yet physically unobtrusive. These are very early days for the firm, but Mr Siden believes outdoor advertising generally is overdue a leap forward in innovation. They are trying to generate £670,000 via crowdfunding to patent & develop this technology.