The end of ad-supported services makes room for open protocols, open source, and regular old commercial software. All of which have suffered from lack of interest—from developers and users—in this environment where they have to compete with “free”.
I agree that that there would be an upswing in those things, but I'm not at all certain that the resulting environment would be any better for the average user -- certainly not in the short term, while people's expectation (which has by now become built into our culture) to get almost anything they want online "for free" remains.
