Universe Sandbox 3 will supports Windows 8 and Linux ?
Windows 8 yes (v2 also works with Windows
... Linux is very likely also a yes.
We've already switched to developing with Unity 4.
The upcoming announcement is about Universe Sandbox 2 and schools, not about Universe Sandbox 3.
Having grown up in the United States in a middle class family that never really struggled, I never worried about my basic needs being met or how I was going to pay for housing, medical care, or food. For me, paying $10 for a game wasn't a huge deal. Unfortunately it is a big deal for most people in the the world and large numbers of people in my country.
To be fair, it was my freedom from worry about my necessities that gave me the opportunity to explore random ideas I was interested in. One of those ideas was a gravity simulator I once called 'Planets' that eventually lead to my development of Universe Sandbox.
http://dandixon.us/programming/planets.htmI know that Steam does charge less for Universe Sandbox in Russia to better reflect average income in those countries, but even if they rolled this out for each country, it would not address the dramatic income divide in any single country.
Income inequality is an issue that has gotten worse over the last 30 years and has forever been an issue worldwide. Turns out we're all better off when income is more evenly distributed and everyone's basic needs are met.
It's too bad there isn't some way to charge (for example) 30 minutes of your personal wage for the software. So Bill Gates might pay $50,000+ while someone making $10/day might pay $0.50. Someone making $10/hour would only pay $5.
If you really can't afford or have no way of paying for Universe Sandbox, send me an email and let me know what's going on and we'll work something out. Money shouldn't be the factor that limits the quality of education and learning, yet it too often is.
http://universesandbox.com/contact/Cheers everyone.