There's an insistent drum beat in motion control nation that says the demise of electromechanical components, including the family of ball screws and lead screws is on a fast track. The well-touted advantages of direct-drive motors for all but a few high-torque applications seem compelling.
As with many technology predictions, the talk of the demise of ball screws and lead screws for linear motion translation often neglects to factor-in those applications for which the approach is highly beneficial.