So if we're going to build new applications that require a large time investment, like say movie editing - today that doesn't matter for the enterprise desktop, but eventually it will when we get closer to consumers - you really need to have a cross-platform story.
If I'm traveling, I'll take a film camera and a digital camera because sometimes there are moments where, if you've lost it, or if coming back and it accidentally goes through the X-ray machine and it gets overexposed, you might have had a really important moment to you and you would be really upset