I wonder if lifeproof nude will work with the 5s. will it be ok for the sensor to get wet?
Are you referring to the Finger Print Sensor getting wet? It will be under the home button cover on the Nuud case, and not wet. Of course the fingerprint sensor will not work then, the sacrifice to make if you want waterproof.
All other sensors, from what I see, are in the same exact spots on the 5S as they are on the 5.
The only other issue could be the flash. I am thinking the way the two led's are stacked on the 5S, they will both shine through the flash cover on the Nuud.