Malone isn't crediting Regan for the internet boom of the 90's. He is saying that cutting capital gains taxes helped spur the electronics boom in the 80's. Since we have had relatively low capital gains taxes for the last 30 years, and most of us agree that low capital gains taxes are a good thing for innovation, why would we consider raising them now?
I do think its interesting that, even when Obama was talking about the potential for large cap. gains tax increases, he made a point to exempt "small businesses and startups." I'm not sure how we could draw that line, but it indicates to me that Obama has exactly Malone's general argument in mind.