Siri isn't good because it can process static commands, we've had things like that for years, Siri is good because of the artificial intelligence it uses. The problem with this new Google Now search, is it's still just dictating to a Google text search, which can be replicated by anyone. I used Siri to do a Google Search for each one of the examples posted above, and got the exact same result.
I'm not sure how these tests would go, because I'm not familiar with the new Google Now, but how about saying things like:
"Remind me when I get to my Dad's to call Mom and let her know I arrived."
"When is my next meeting with Scott?"
...
It's Siri's intelligence that sets it apart from just dictating the words into a Google search. Does the new Google Now have these capabilities?
Most of those commands will work. Issues with regards to semantics will only improve.
One big selling point is that Google search is quicker than Siri. We'll see how iOS responds to Google Now. Boy do I love competition. They're already coming out with a 7.85 inch tablet iPad that will cost below $249 apparently.