Ruby book sales pass Perl

Chart from O'Reilly

Normally I don't repost stories from other websites, but this one is just too cool to pass :-)

So basically Ruby book sales passed Perl, Python is far behind, and Javascript books are on the top, but are mostly about AJAX not actually programming in Javascript. It seems that Ruby is having huge momentum right now, as book sales indicate what people are learning now and therefore the technical trends for the next few years. So are we already getting there ?