Metabones speedbooster: is there any reason to get full frame now?

I'll be very interested in more reports once it comes out. Thus far I've gotten a very positive review from a video oriented user who used it with two lenses. I've yet to see a teleconverter that I'd decide on with only a single review with only 4 MP samples and two lenses. It all hinges on how well corrected the internal optics of the adapter are, it might be something that works very well for video (at least until the 4k revolution) but isn't quite there for stills. So I'm cautiously optimistic.

If it's even remotely good BlackMagic should buy them now, that eliminates the main issue that keeps the BMCC from being a very, very low cost RED, the lack of lenses.