I believe the price of 60k per CPU is more aimed at Financial Companies using StreamInsight for algorithmic trading. It should be compared to other CEP vendors prices. There are actually a few Open Source CEP-platforms, but I don't know about their quality.
About SQL Server pricing in general, I agree it's an issue, but it's a bit outside the topic of this thread.
Let's discuss the price for a moment -
60k per CPU?
These prices make sure that small companies that will once grow big (say, Facebook, Twitter few years back) will never consider SQL Server as a solution.
In the long-run, MS loses more popularity to free/open source (or at least cheaper) solutions.
Even for those who can live without the "Enterprise" features, but need a true scale-out solution can't work with these licensing models...