Not sure what you're asking. The original "Book of Xenon" defined the vision for the xbox 360, and we've only recently got some of the features that were originally envisioned for the product. It wasn't a case of broadening the appeal over time, it was a case of delivering on an initial vision over time.
The 360 cut a huge amount of features that were originally going to be shipped at launch, in order to make their launch date. So to an outsider, it appears that MS launched a console aimed at the core and then slowly changed their focus to the casuals and media stuff, when in reality, the 360 we have now is what MS originally wanted to launch.
There is a similar vision document for a future product which shall remain nameless until the 21st, and it is equally ambitious in it's goals, and there's no way the new box will be able to meet all of the goals in that doc at launch (and it's not a document that has ever leaked). I'll enjoy seeing what got cut and how they're going to position themselves at launch. They have the unenviable problem that they can't easily launch something which cannot match the 360 feature for feature at launch, but the 360 has taken 9 years of development to get to that point, and they have had less than two years here to match, and exceed it.
But to answer your question, or what I think your question is, I don't think "updated research" will significantly change the vision that they have for this product, although it might change some of the details, like what to include at launch, and how they're going to position themselves in the competitive landscape.