I think this will be my last post on this (for now anyway) and it comes from this blog and it is what I found most interesting about the big announcement as well:
The most impressive part of the announcement (for me anyway) was that the long-fabled Marklar turned out to be true. This was the code name for a secret workshop in the basement of Cupertino where shadowy developers maintained x86 builds of OS X just in case Apple ever needed to throw the switch.Now, think about that for a moment -- to use (an admittedly cliche) car analogy, this was the equivalent of an auto maker producing alternate versions of their engines, keeping them tuned, bug free and optimized, and locking them away in storage. Or from a web developer's perspective, producing two, complete, functioning versions of a web site, and only using one online.
But we're talking about a full blown operating system here, and all the internal applications produced for it. Microsoft can't seem to get a single version of Longhorn out the door for one platform, while Apple has released multiple versions of OS X for two platforms? That's not just incredible, it's stunning. I can only imagine how vindicated and proud Apple's x86 team must feel.