That's not what reactive means in the context of what Andrew is referring to. It's not about the general meaning of the word. It's referring to SIE's business strategy, and in business, it carries specific connotations. PS4 Pro isn't a reaction to some unforeseen occurrence or the result of a wait and see approach. It's born of SIE looking at their own strengths, certain data, and anticipating market trends, and what they feel they need to do to better accomodate certain demographics along the PS4 roadmap. When he says it's not a reactive move, that's what he means.
Yep.
That's called a pre-emptive move