Where is OmniGraffle headed in the next year or so?

I am currently using a PC and miss my days of using OmniGraffle because I've found nothing like it. So, I would love to see OmniGraffle be ported over to the PC world. But apart from that, I am wondering why the user base for this app remains rather small and isolated? Given that like myself, other users I come across are passionate about the product. Is there any plan to try to expand reach of the platform? It would be great to have a wider range of support off site and more users to produce even more resources and community.