If the handles do not pop-out, then it would make it very difficult/impossible to manually pull open the door. I'd be surprised if the front doors are auto opening/closing, so therefore, I would expect the handles to pop-out in some way.
I guess you missed the point: what if, by pressing the handle, the door pops out and you can pull it out from the side? Given that the handle extends to the side, maybe this could happen by touching the handle with your palm while readying your fingers to pull the slightly ajar popping door fully open from the edge?
It seems surprisingly hard to find any video of how the front doors on Model X prototypes operate. Maybe I just suck at searching, but several video seems to cut out the parts where the front doors open (even if otherwise the video is a continuous walk around!), showing them just closed or open. This may be simply because there really isn't much to opening those doors on the prototypes, but it would be nice to have more video of it anyway.
This Santana Row store video is the best I could find, but it is of the 2012 prototype - it would be of interest to see if the 2013 facelift prototype is any different:
Inside the Tesla Model X - YouTube
In this video, around 0:20, the front door seems to either not fully lock in place at all or unlock by touching the handle area and open by pulling from the open window. At 0:45 the video, the front doors open perhaps through a button inside the interior door handle/pocket - the man inside the car has his hand there as the door opens. Prior to that he makes a motion on his hand that might also suggest some button or lever lower in the door, but again it may be the door doesn't even lock in properly for demo purposes.
I distinctly seem to recall a 2012 or so Elon Musk interview where he says the production Model X handles might extend but that at this point they were just buttons. Personally I don't expect extending handles on the production Model X anymore, just stating what I recall. Besides, extending handles would make major sense only on the front doors, though would be cool on the falcon wings too - they could be pullable buttons.
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For opening the front doors from inside Model X seems to have the same interior door handle as Model S?
This would make sense, of course. It still remains unclear how the handle works from the outside.