GTK - why not?

hi @ all quick question: ready? here it is! WHY IS PHP - GTK not webbased? sorry, may i am wrong, but i am looking for someone, who is responsable for GTK. cz, some programmers (including myself) thinking loud about, what could be the reason why PHP-GTK is not webbased. that would be high-end applications. + u have nothing to install. + all is accessable over the internet and + just call it, like page over an http link + and the source would be still php. so here is the main question: Why not? Would it be maybe a option in the future, if yes, WHEN ? thx to everybody, who could send me a little personal feedback and/or telling me please, over who i could get some more informations. PS: sorry about my english, but its d**n late here. best regards CBQ