We are talking bout technology.
The most important criteria for judging it are 'does it work?' and 'what can it do?'. NOT 'how flashy it is?' or 'how many quantum mechanical tricks does a device incorporates?':
If incremental advances will get us cheaply to LEO, then, at that point, these advances will transmute into a technological revolution.
If whatever newly discovered physical principle has little application in the technological field, then this principle does NOT constitute a technological revolution.
As for incremental technological advances - I merely pointed out how only slow, snail-paced advancements (nothing revolutionary) have been taking place in transportation since the seventies. This remains the case, regardless of whether some like this fact or not.