The narrow definition of disruptive technology is probably something like "a new entrant who through a low cost product, depowers much more established and high end players." That's a bit different than just trying to be top dog.
Not just low cost, but slightly inferior as well. Otherwise it is just price competition. Think ARM vs Intel...definitely not the same quality, but much lower priced and good enough for a significant subset of people.
The startup definition of disruptive technology is something almost nobody's heard of that almost nobody uses that hopes to rectify those usually infallible problems and matter in the billion dollar industry it barely exists in!
