The perks almost justify buying a device for me. The S series perks include 1 year or 36 flight segments, whichever comes 1st, of Gogo wifi. An unlimited Gogo plan runs about $40/month, a single flight session around $10. So long as I use the 36 sessions within a year (likely), I'm getting an S at an effective $360+ discount. Of course, Gogo might drop their absurd rates, and I could live without wifi on a lot of trips. Gogo may be useless on a lot of airlines.
The Tab S series doesn't include the $25 Google Play credit... Though the
Tab Pro series does.