First of all I'm amazed anyone thinks that making tea is too much of a hassle. That said, I need one of these, I never bother to make tea.
As an American, I'm not super familiar with the traditional high tea ritual. Once for a bachelorette party I had tea at the Bellagio with a bunch of fancy ladies. We had champagne and lots of tiny delicious foods. This cake would have been a gaudy yet not unwelcome addition.