Well, it all boils down to your needs, I don't really need that.
I sit at the same computer all the time, and I rarely restart my X server, even more seldom so now that I've moved to X.org, and every tab has it's own history, so I'm with you on that one
Konsole to me is just a bunch of Xterms gathered conveniently in one tabbed window, exactly what I want.
Oh and I like QT, especially compared to GTK which I don't like much