That video seemed incredibly prescient. A lot of the features in the video are a couple years off from mass adoption, and maybe it's a bit more geared towards the 90s mindset, but there's a current day equivalent to most of the functionality.
Well for whatever reason it certainly didn't help MS in the long run to produce that video. They missed the technology that actually mattered like the iPod, iPhone, and iPad and are still scrambling to catch up to everyone.
Actually we have no idea whether it helped or not. It may have helped a lot, just that there were too many other forces fighting against it. I'd imagine a video like this could serve as something to get the employees talking (even if they bash it).