I like how you write PhP, gives it an air of respectability!
MHO: (ok maybe I'm not so humble), but most companies use Microsoft OS and products on their networks, and when they get around to moving up to business on the web (I'm not just talking a promo site) and an intranet, or whatever, the first thing they do is look towards microsoft products as they believe "they are the only ones out there". Typical corporate bloak doesn't even know what open source means, nor probably care. So they turn to FrontPage and ASP and etc.. And the first thing they realize after venturing a way into FrontPage stuff is that they need someone who knows the back-end side of things, connectivity to databases etc, and what do they do: They advertise for someone who knows ASP and this creates, to a certain degree, some market movement, but mostly it creates an illusion of popularity.
On the other hand there may indeed be more developers using the thread's mentioned languages and many (of those developers) may suggest to prospective employers a switch to their language of choice. Therefore, MHO is that PHP (and sisters) will win from the grass-roots up, because ultimately nobody can do nothing without a geek!