Disney doesnt do anything without a reason and I am not seeing a true reason for why they are building this, there has to be more than what is in the articles and on the news.
Having been raised in NVA for 40 years I know exactly where this is going and I just don't see a reason for it.. Yes it's a conference center, a high end, beautiful one at that, but there is no metro system, not convenient to any airports, it's not near any of the tourist destinations and I hate to say this but it is in PG County, which does not have the best reputation in regards to crime and crime preventation (I know there are some nice places but overall it has a very negative following). None of this follows the pattern that Disney usually has for parks, resorts (like Hawiaa new resort, etc.)
I can tell you one thing, it won't be cheap to stay there, nothing within the radius of DC is cheap.. I can only assume it will be Grand Floridian pricing and higher...
There is more to this than we are being told, should be interesting to watch how it unfolds...