Here's an absolutely great piece from John Gruber about companies that create and publish futuristic concept videos. Yes, they look cool but as many people have pointed out many times before, they already made Minority Report. It's great to think and imagine what the future COULD be like, but in essence, it's just a waste of time. If those videos were true, we'd all have flying cars and robotic servants by now. Just think of the videos that Microsoft has created recently. Courier and Surface come to mind. I wonder how those two products are doing?
This is also why I respect Apple for their secrecy and refusing to announce products before they're actually ready to ship, let alone exist. Under promise, over deliver.