We might get there with utility fog (aka the smoke monster from Lost?), I guess, to simulate objects, both inorganic and organic, although a suitable, adaptable template would have to exist in the database with AI control to animate it based on cues from the human creator.
The Krell's direct conversion of energy into structured matter (or force fields or whatever the invisible monster was) under complete mind control, I doubt will be feasible for a very long time, if ever.
Three words
Bose Einstein Condensate
https://en.wikipedia.org/wiki/Bose–Einstein_condensate