Nice slides but I am bit surprised about the claim thas Java runs on only 2-3 platforms and Parrot will run on at least 7. I thought Java runs on a lot more platforms (incl. phones), Perl runs on even more platforms (excl. mobile phones) and Parrot is planned to run on all the platforms
where Perl currently runs.
You're missing that Sun has three different Java platforms (J2SE, J2EE, and J2ME) that support different features and supports them on only a handful of operating systems (Windows and Solaris the best, Linux sort of second-hand, and everything else further down the line).
For example, I run Linux PPC. When will I see J2SE 1.5? It's worse if I run FreeBSD x86. For anything more "exotic", forget it.