Regardless of the open-sourceness of Steam, the problem is still the same as it as always been with Linux : the marketshare is way too small for major companies to do Linux port, and most people who use desktop linux have Windows somewhere too.
Apart from Valve and indie games, I highly doubt we will see AAA games for Linux in the next few years.

And then there is the issues of video drivers.
Even if there have been good progress done recently, compatibility and performance are still way below Windows drivers.

Still, it's a good news, and it might be the first step that is needed to start.

The quality, definition, and everything, and implementation is getting better each time, but I've always felt something is lacking to make it truly like reality.

I don't know what is is, because it's beautiful, and almost every details are here, but it does not look true.
Maybe it's because it's too good, ie it is lacking the defaults which make reality what it is?

I was having a look at one annonymous IRC channel more than a month ago, and I saw a few guys asking for a link to the "LOIC without the trojan".
I assume this is the same one they are talking about in this article; so this not relly new.

What is not said in both article is that something like 80% of the planes will be built in India, and that there has been a huge technology transfer.

I don't know if it was the case with Eurofighter too, but I'm almost sure the Americans would have ever accepted it.