Your comment seems to imply that there is already a rich ecosystem of VMs in use, but there aren't really. Basically, there's the Java VM, which is bad for functional languages, and there's Mono, which is not really ideal for Scheme either, nor very popular except that it allows compatibility with .NET.
At any rate, I'm pretty sure PLT Scheme predates both Java and the CLI, so you'd be better off slagging Microsoft for their duplication.
First, the Racket VM has been under development since 1995, so it's not "another VM".
Second, the Racket VM supports lots of things that other VMs don't: the Racket module system , kill-safe synchronization , custodians and eventspaces , first-class continuations, and many other things besides.