Your piece blowed my mind, i really love this style, i dont know how to do it, but i love it, lol, so i put my eye to help, i just played with the color correction layer on photoshop looking for your "WOW" factor, try that and see what happens, i show what i achieved in one minute test, maybe is too orange, but thats personal taste i think.
The "wow" factor seems to be the "contrast"/"grays"/"blacks"/"whites"/"color mood" factor when everything else is okey.
But im nearly starting to do some wow pieces my own, so take it from where it comes, others maybe can point you better.
And maybe the second focal point, the guy from the screen...maybe an ugly face to fear will put more emotion on the picture, theres a cool naive/maniac mansion feel on the piece, so maybe trying to put some ugly alien makes it more mysterious, just to keep looking for the "wow" factor and not to trow this wonderfull piece to the toilet cause is really nice.
T=ART, ...keep going to that special place, never surrender...