If mass storage densities had kept on doubling every 13 months or so, 307 gigabytes per movie file would probably not seem extraordinary today – we would have s

If mass storage densities had kept on doubling every 13 months or so, 307 gigabytes per movie file would probably not seem extraordinary today – we would have several-PB storage media by now. But as it stands, even a state-of-the-art hard drive isn't going to hold many uncompressed movies – especially given that 640x480 doesn't quite cut it anymore!