Evidence to the contrary - the article is about a UAV filming with a bulky HD camera attached to its undercarriage. So it is possible, probably just a bit too expensive at the moment.

...for the comments. I know RC helicopters have been used on plenty of shoots before, but I thought the use of advanced UAVs with automatic navigation functions, coupled with an integrated HD camera system like the Cineflex, seemed like enough of a step up to be worth posting about. The video linked from the article shows some pretty impressive stuff being filmed. As for my headline jumping the gun, my original header was actually posed as a question rather than a statement; I'm aware that this option is still massively expensive and in the very early stages...