taken from MK:T
Smoke(Human):
In his human form, Smoke was a lethal assassin working for the Lin Kuei. but when they decided to automate their ninjas,Smoke got caught in the middle . He became a cyborg assassin, whose human form would exist as a memory forever more.
Hope this helps

so there's no hope of him returning to normal
well that sucks doesnt it..

Well both his human ending and robot ending in MK:T state that that is not gonna happen, yet what we may see is a hybrid form between the two, yet you never know with those crazy cats at midway

There was no hope for Cyrax, either.