I don't think their target market for the Pro is the hobbyist, or Mom and Pa, it's the enterprise business market, where the iPad has seen little penetration.
This market doesn't care if the kickstand works on your knee. Or about a few hundred dollars here or there. Exchange integration, legacy internal applications, these things matter.
I work in the enterprise business market, for a 100 year old blue chip firm - and the iPads have come in like a tsunami thanks to our BYOD policy. They have Exchange integration. Legacy internal applications? These have all been web-enabled over the past 10 years.
And the adoption has been top-down: it's the C-level execs that are driving this change. This has been going on for two years now. Microsoft seriously missed the boat and more and more is considered to be an old-school technology company like IBM.