I remember it took a lot longer for DVD to become established. I was collecting VHS up to 2000, and five years before that there was a small DVD shelf in HMV Central London which had about 30 or so titles. For those first five years, the shelf space only doubled year on year, while the majority of the shop floor remained devoted to VHS. 2000 was the tipping point though, as all of a sudden, every main stream title was released on both formats, and people began upgrading their collections in earnest. A couple of years later, the situation had reversed, and VHS was a small corner of the shop with about 500 or so titles, and everything else was DVD. This was consumer driven though. From day one with Blu-ray, every main stream title has been released on both formats, and in some cases in exclusive Blu-ray DVD combos requiring fans to buy both. It's been an industry led change, and while most of the high street video shops have gone, we're still only five years into the cycle and supermarkets devote about a third of their home entertainment shelf space to Blu-ray, far ahead of the same situation with DVD and VHS.