If you think your new HD movie-collecting hobby is going to be a long and rewarding one, think again. According to a report from research firm SNL Kagan, our current dalliance with Blu-ray and HD DVD will soon be old news as Studios switch their focus online. It suggests that sales of all physical video formats will become inconsequential by 2015. It estimates that the current global market for both formats is likely to hit 749m dollars this year and will peak between 2010 and 2013, when HD formats will account for over 60 per cent of all disc sales. But after that comes terminal contraction, as competition from online solutions, both streaming and download, really begins to bite.