Yeah the thing that will carry this is going to be the character creator.
But, all the things we can see so far are great. Great UI, very nice with the icons for spell schools or previews of monsters. So if the character creator is good, then the rest of the site is just an amazing bonus.
So this is a just a website? No mobile app or anything? No way to access when you don't have an internet connection? I'm not complaining, just making sure what is available to test.
From the images on the home page I think we can safely assume the project is going to be both an app and a web utility. The development team appears to be giving us what they feel is polished as soon as it's ready which is pretty awesome.
I do however look forward to the app version (as I assume you do) more than the page itself so my phone can have some at-the-table functionality beyond apps already available.
Question: The compendium, will it have a search bar for searching specific actions or stuff ? For example, I was trying to look for the opportunity attack rules (which I now is in the Making an attack section), but for someone new I guess it could be easier if ythere was a search bar.
Looking forward to see the Character Builder... I was fan of it since 4e. :).