totally obvious to any half-way observant person.
All innovation is simply a series of very small steps. All "discoveries" or "inventions" are at their root, fairly minor enhancements to existing knowledge or craft.
Sure, sometimes those minor enhancements were not at all obvious to anyone except the exceptional person (or team) who made them, but, once the enhancement is announced, it's completely obvious, to anyone willing to analyse it, how it rests on all the past development.
I challenge anyone to find an example of any discovery, invention or other innovation which does not fall into this rule.
Nothing annoys me more (well, not many things anyway, dirty dishes, unmade beds, ....) than people wandering around talking about be "entrepreneurs" , and "creatives", with this shit-faced superiority that only ignorance and inexperience can produce.. Most (98%+) of end up failing, spectacularly, because they think all the value is in the idea, rather than the implementation of the idea. Reality shows us, 99.999999% of the value is in the implementation of the idea, the idea is nearly worthless.
I think this is what Linus would say if he had conferred with me first.