It's a possibility for the future. I don't think it'd be hard to do, except perhaps giving people the ability to use it without signing in separately. Most of the effort would be in the content creation and maintenance.
Yeah I don't know how easy it would be to make it so that you don't have to login on the other site. All of the times I have seen MediaWiki used it requires a separate login from the forum it's for.
One thing I can tell you that the Wikipedia pages are growing

Pages does not exist now, but will have a page describing what we have it here in the future

I have been uploading obsolete electronics component in the Wikimedia Commons page. I'll never know when it would be useful for a page they have at Wikipedia site

Just curious, but could you maybe link a few of the pages you have made?