Unfortunately a planned economy can't work. If you plan the entire thing and the smallest detail doesn't line up with "the plan" then how does the rest of the plan adjust? This was tried a lot in the USSR (5-year plans) but always failed. Additionally, I'm not sure how you plan an economy without everyone being on welfare (i.e. provided for by the government). Wouldn't their wages, or alternatively their means of subsistence, need to be part of the plan?
Planned economy is not the future.
Production on demand is. Just like with a 3d printer , you dont central-plan what comes out of it, but instead you have a direct access to the means of production.