1000 pin controllers

Does there exist any microcontroller kits like arduino where one would have available 1000 or greater analog output pins? I realize there are techniques like charlieplexing, but imagine you couldn't go that route, but instead needed to have more than 1000 output analog pins that could be controlled via a computer. Where each pin might only draw 0.05 Watts. What would one use to achieve this? Would you have to connect a bunch of Arduino Due's together? And would you then have to control each arduino separately in your program? Or is there some simpler way to acheive all this? How would one solve this problem?

Anything is possible. Your question is very general though. The way to work this sort of problem out is to have a rough specification first, if the channels are all analog, what sort of analog specs are you talking about, for starters. Having a rough spec allows you to look at boundary conditions, from there you can modify the specs as necessary, i.e.relax the sampling rates or use faster processors, for example.
If you are talking analog out, I assume you mean DACs, The Arduino only has two DACs, so that is not much help. There are cheap serial (SPI) DACs avaialble, with voltage output. You could mux the Chip Selects, but data rates would be low, and data skew may be a problem. One Arduino may possibly do it at modest speed, but it depends on the data structures and processing needed to support the analog channels. The DAC interface would be volumetrically, large, mostly because of connectors.
With a system like this you would make it modular, with say 32 or 64 channels per board, and put it into a rack mount system.
More details would be useful,
cheers,
Richard