Teen-C Revival Conteenues

Why are there all this so-ten-years-ago sounding bands cropping up? The last two culprits to land on my desk:
POPPY AND THE JEZABELS. i did a review somewhere it smells a bit like kenickie.
THOMAS TANTRUM takes me back to hiding in my bedroom writing a fanzine listening to 7" singles I got from Spinadisc. [sigh].
oh and obviously this is all LOS CAMPESINOS' fault.