This is really last year's news. Apple has been floating these devices internally for a while now.
The difference is that this unit has a docking station and is aimed at home users, rather than business/enterprise niche uses. Apple has taken a bunch of patents applicable to this sort of device over the last few years, and probably had enough technology left over from the Newton to do this fairly well. (Yes, the Newton really was that far ahead of it's time, and hardware!)
Nothing is sure, yet. But if Apple really does bring out one of these, I'll be standing in line for one of the first, even if I have to hock my Mac running Linux to do it.