That’s how I felt when Gavin/Parity people first started using the term, felt a bit like an appropriation. It’s a marketing term, people like new numbers like HTML5 or Industry 4.0. While it’s not perhaps so accurate for new decentralised storage/compute/consensus tech, it encapsulates the broader movement pretty well. I think we’re stuck with it for a while for better or worse - at least until web4!