Will these languages be treated like J# and JScript.NET? We shall see.
If they perform better than their counterparts it might make python and ruby coders able to take on more platforms and capabilities.
It is still only pre-alpha and missing much but like mono.net, it can have an impact when platforms and languages merge.
Earlier this year, Microsoft assured developers that it would be continuing to build languages on top of the Dynamic Language Runtime (DLR). Considering that IronPython had been a success in terms of implementation, the company decided that it would make an attempt at bringing Ruby into the world of .NET. With the help of Ruby expert John Lam, today the company announced that a pre-alpha build of IronRuby is now available. You heard it right, this release is pre-alpha—many Ruby features and libraries have not yet been implemented.
For IronRuby fun ScottGu has a great blog post on getting started with IronRuby.