Now here is something that they should "Remake" I kinda like the overall concept but sadly it never took off...

As I understand, MZ-X500 is still a current keyboard, as for it hasn’t been discontinued.
The concept is interesting. But as for the sound I don’t see how it can compete with PSR-S670, which can be bought even cheaper, and as a result I think this is how X500 became an outsider.

Casio introduced this keyboard as a continue of MZ line, but I can speculate that the people who had designed the legendary MZ-2000 had nothing to do with this new model. MZ-2000 still looks kool, and to my taste X500 is not that impressive.

In the same time with some tweaking some people get an impressive result from this machine. Also, Casio has a Privia PX-560, which is also special in its own way, but, again, Casio’s are not really cheaper than Yamaha in any significant way, and when I’m thinking about getting PX-560 then I have an argument in my head that with an extra $500 there’s an option to buy Yamaha MODX7 which is like a totally different story. So in reality the dilemma looks like “well, okay, this Casio is nice, but do I really want to spend my money on this to end up with something entertaining or I would rather save this money in order to get something not only entertaining but also capable of providing some professional opportunities (like making music for commercials, TV, etc. )”.

The concept is brilliant..
The build quallity and sound quallity where disputable at best,,

But in concept its more workstation them the Genos...

now is Casio's chance lets see what they do..

That thing has a lot going for it. I can see where, especially, younger people might love it. It has some features I wish other brands had.
For example, it has great speakers and some of them point to the audience while others point to the player.
It has a lot of programmable pads, sliders, etc. In the demos I've heard the sounds are pretty good. Nice touch screen...
Not sure if it has much in the way of traditional styles?

It sounds nice, very similar to how I remember the PSR8000 sounding.

Agreed... Pads on the new arranger models
eg:pa5x etc, would be great