I witnessed a guy using this mixing system live last night and I gotta tell ya, I was quite impressed. I know this system has been discontinued. No longer in production, but the idea of it was facinating to me.
For those who don't know about it, it consists of 2 main parts. The actual mixer resides on the stage and looks like a big stage box. The part that looks like a mixer that you have at FOH is just a digital controller. The beauty of this system is that you connect the 2 pieces together with just 2 long cables that have XLR connectors! That's it! No cumbersome heavy duty snake required.
I hear back in the day, this system sold for around $6000 - $7000 depending on if you got extras, like the optional meter bridge, etc.
Anyway, like I said. I was VERY impressed with it and the sound I heard. Got me thinking big time.