The only skin I'm seeing in these pics is the stomachs - if you see anything else that should not be shown, then let me know instead of vague words like "nangi" or whatever.
NATURALLY when a fashion designer wants to show his design, he's got to reveal the choli (the designing on most of these saris is on the choli) ... and the ONLY wayto do that is to make the girl stand with the drapery moved to the side so that the whole choli shows.
When you actually wear a dress like that, the choli area is covered by the cloth she's holding in her hands. So its not really nudity actually - the designer is displaying a SARI that he/she designed, and thus some bellyshowing is necessary. That doesnt mean girls in Pakistan or outside would not wear these saris, they just wouldn't wear them with the drapery withheld from their chest/stomach area.