On one hand I agree that if everything you have uses PD, your laptop, your phone, your powerbank and a charger like that and it's powerful enough to handle it all then it probably makes sense to also have an iron that works with it and it's all interchangeable.
On the other hand we already have a standard power thing, it's called an outlet. And in practice you need to charge/use things in parallel so you'd need to carry around like four of these.
