I know that on HN a majority are on Mac or Linux, but Windows is still a big platform. But yes, we know it's a major problem and it will be fixed very, very soon.
No it isn't. There are lots of very successful programs that only run on one platform and make money.
If you as a timestrained startup start developing for multiple platforms before you've got the resources to do so on the other hand then you have a problem.
I'm well willing to put some time into looking at what you've built but if I have to go through the trouble of installing a VM for it then you're out of luck :)
It looks good on the video though, and the few bits of screenshot also look pretty slick.
Did you notice the EyeOS link posted by ErrantX earlier today ? How does what you are doing compare to that ?
About EyeOS: I guess today is the day of the webOS on HN...
I looked at both: EyeOS seems to have some nice apps, but no notion of instant-edit like wikiOS. Personally, EyeOS is just another webOS, but with wikiOS, the wiki-factor might make it into something completely different. Hard to tell how much of a game changer it is.