:I agree in principle, but only if there is enough material to make a useful article out of it. What exactly do you have in mind? 

 :If you can only stretch it about by another two or three paragraphs, then I would probably be hesitant and leave it as a sub-section. The sub-section, in one way or another, would stay anyway, just like E4, More4 and Film4 have sub-sections and main articles. An article for the sake of a couple of extra paragraphs seems a bit silly, unless it can be extended a lot more than that, but if you think you can, then great.