Well, a factor of two is an order of magnitude in binary.
OK, so I'm a pedant. Sue me. ;-)
But to be serious: I'm a pseudo-broadband user. I use 3G HSDPA, which, while vastly superior to my old dialup (more than a base-10 order-of-magnitude, in fact) it is just barely able to handle most streaming video. Of course, it may not be my connection, it could be the fact that I'm in South Africa, and our geographical isolation from the First World reduces our national bandwidth somewhat.
Whatever the cause, a 2x reduction in size sounds very appealing to me. I can always buy a faster machine to handle the decoding, if need be. I can not afford my own exclusive 10,000 mile T3 line to Europe!