I suppose the same will soon be true for most ML-related areas of research sooner or later, at least as far as applied ML is concerned.
Already, a substantial amount of research innovation in NLP and CV has been coming from big companies in recent years.
Of course there is a discussion to be had about what that means for society at large. At this point, a lot of said companies to publish their results at conferences etc. But what if at some point they decide to be as "open" as OpenAI (ie., not)?