I wouldn't call it next-generation. To me, it really resembles what the Flock browser was trying to accomplish.
Browsr doesn't do that, although native web apps provide a similar convenience.
Browsr main objective is to make the browsers that default place to keep user data. Instead of you social connections being on Facebook's server or Google's server, it should be on your PC. Users can let other services access this info (or even store it) but they don't get tied in to these services.
This. You describe browsr as being "like an operating system" in the post, but I think what you've said here is way closer to what you are demonstrating.
Also, I like this concept.