This is, in my opinion, kind of a myth. In the markets where the average revenue per user is high (Europe, USA, Canada, Australia) there is already (or there will be very shortly when Viasat3 is fully launched) high-speed reliable Internet connectivity through GEO satellites. And yes, the latency is huge and there are data-caps (which are pretty low if you want to binge-watch Netflix). But I am not sure that LEO constellations will be able to compete with GEO vHTS in price (not to mention the huge challenge of getting the price of the phase array user terminals cheap enough), so I am skeptical they will be able to capture a significant fraction of the market share.

In the rest of the world, the ARPU is so low that it's hard to have a viable business model for broadband satellite connectivity (for all orbits GEO, MEO, or LEO). Furthermore, 90% of the population is currently covered by 3G/4G networks, so I would argue that for most of the 3.5 billion people currently unconnected, the issue is not infrastructure (but other factors such as affordability, relevance, or readiness). Finally, populations in those countries connect largely using mobile broadband (i.e., in Southeast Asia 75% of the population only use cellphone to access the Internet), so I think that fixed-broadband will have a limited impact in those places. (Maybe they can get a higher share of the cellphone tower backhauling market, but it will depend on the price per Mbps/month they can offer to MNOs).