Where are you going with this? A "browser" is a delivery agent, sort of like the paper and binding in a book. The content of the book can be innovative but who cares if the paper is?

Perhaps you are asking "Can you deliver the experience you want to deliver in Today's browsers?" "If not, why not?" which might inform the question of missing features, but such surveys tend to collect dreams rather than requirements ("if only the browser could read aloud the page, I'd make a kids book..." kind of thing where the thing holding back the requester is not the browser but their own inability to write a kids book)