What's so bad about Gtk/Maemo that's so much better with Qt/KDE? Everybody seems to cry that Qt/KDE is the holy grail of desktop experience, but nobody mentions any arguments to back it up.

Qt is not free, is owned by company (which now happens to be Nokia), is only GPL'd for noncommercial development, and Nokia will have no problem keeping their commercially used Qt version closed source. Non-GPL software may not even link to a GPL'd library anyway, so GPL appears to be a bad choice for an essential library such as a widget toolkit. Even if you had the GPL Qt on your desktop, closed source vendors such as Skype or Google may not use it, but have to install their own commercially licensed Qt version.
<personal-opinion>
Apart from that, KDE is a usability nightmare IMHO, but don't lets start a flamewar on this. GNOME isn't perfect either!
</personal-opinion>

As it appears, the acquisition of Trolltech by Nokia will drive even more commercial software to Gtk/GNOME.