Being cynical, there's also the matter of original releases passing one by one out of the copyright period and into the public domain. Presumably (I am not a copyright expert) the re-mastered editions count as new recordings, with copyright extending another fifty years from their release.

That said, apparently there's a mono edition of the whole lot which I've heard truly rocks- most of the stereo releases were done before the art of mixing for stereo was perfected (eg drums and vocals in one speaker, guitars on the other). I always preferred the sound of my Mum & Dad's original (mono) vinyl copy of Revolver to the various stereo mixes of songs that appeared on later compilations. But much as I'd love to have the whole lot, in a handy convenient digital package, I don't think at £199 I'll be rushing out to buy it