There is some space, but it's highly unlikely it'll be explored by anyone with enough weight to make an impact. I'd really want to see a browser that's a colle

There is some space, but it's highly unlikely it'll be explored by anyone with enough weight to make an impact. I'd really want to see a browser that's a collection of very loosely coupled independent cooperating programs. There are Uzbl and Surf, but they're only modular systems around a big monolithic core. That would mean the real end of the browser war, because there won't be any browsers. There will be rendering engines, there will be UI layers, cookie storages and databases, data synchronization programs, etc - and compilations of those (because while everyone wants to have flexibility options and ability to customize and control, no one normally wants to build system piece by piece). I doubt something like this would happen.