Britons watched 800,000 free online TV streams and downloads in 2007 – but they will watch 1.5 billion this year and 2.8 billion in 2012, Screen Digest forecasts. The research firm has issued revised predictions based on the arrival of BBC iPlayer, which it said accounted for 38 percent of all free TV streams and downloads last year despite only having been officially launched on Christmas Day. “iPlayer