i think the hype over this is a little greater as it is more accessible to more people...the 7xx series were a little out of the price range for a lot of people, although everyone in the know was wanting them. now with the microtrack it's way more affordable and providing just the recorder, which we've all wanted since we're all so picky about having separate, individually flavored mics/pre/a-d, so the willingness to adopt an all-in-one is lesser when you have to give up your pre/a-d...not that you have to but to justfiy the cost, perhaps. with the microtrack, it replaces, at a very reasonable cost, only the recorder part of the equation, preserving the sound we've all worked so hard to obtain.
i'll build a 24-bit playback system when i buy my house (still planning on doing that this year.) maybe by then the device will be ready to do it (if it's not right out of the box) and i can afford all the extra storage and reap the full benefit through playback.
i've got modest hopes, all i want at first is a solid state, reliable recorder for 16/44.1. i hope i am not disappointed.