Well, aside from there being a whole thread on the Samsung tabs:
http://www.flyertalk.com/forum/emira...-orders-3.html
1. Some would argue that "making the most" of J doesn't mean drinking yourself into oblivion but rather being sober enough to enjoy the amenities and environment.
2. When one is concerned about others counting how much one drinks this usually is indicative of a much more serious issue.
3. It makes absolute sense for EK to record and store this info and mine it, it's basic Business Intelligence to know these things. And crew have kept tabs mentally and gossiped about how much people have had to drink since long before electronic ordering tabs were around.
I used to like to indulge quite a bit when I fly, but in the last year have been more restrained and it makes a hell of a difference being able to walk through DXB without a headache and enough alcohol on my breath to knock out a small rhino.