Yes, WebTorrent enables plenty of really great, novel use cases for BitTorrent technology, but it will remain a second-rate BitTorrent client in the eyes of most existing BitTorrent users without great interop. Although I personally do like these new WebTorrent-based web services, there's no guarantee that any of them will ever reach critical mass in terms of adoption, whereas BitTorrent itself has long since reached critical mass. To say that "normal clients don't really matter" simply because WebTorrent can enable new use cases for BitTorrent (that haven't shown any significant traction) really seems like you're missing the proverbial forest for the trees.