Feedly got 500k users just a few days after Google announced Reader was going to be shutdown. That's 500k people who have a pulse on this type of thing. The actual RSS user total must be much higher, I guess we'll see how much higher when Reader actually shuts down. But whatever the number is, it's pretty clear that there are enough RSS users that a real business can be built on top of it, and indeed there were business built on top of it before Reader and I'm betting there will be real businesses built on top of it after Reader, but I find it really hard to look at what we know and not conclude that Reader had a profound impact in this space.
> The fact of the matter is that when Apple finally kills off the Mac Pro there actually won't be (lega) alternatives,
I don't know what you are talking about, the Mac Pro is a tower computer, there are many alternatives today and there will be many alternatives when the Mac Pro goes away, Apple doesn't dominate the tower computer market.