If he absolutely no backup and no access to the private key, there is no way he can get his btc back or spend them.
It will make everyone else a little bit richer.
Unfortunately that was my conclusion as well. And since he had no backup of the Tablet, have reinstalled it, and the app, I wouldn't put my hopes up on finding the data on the tablet.
The only fragment of hope I had, was based on the fact that he used to have he´s BTC wallet on the Ipad, and a backup of the Ipad , and in this case, i´m pretty sure there havent been any changes to he´s account since he had the ipad. So the the thought of being able to utilize that for something crossed my mind