They need that stretching from time to time, you know. Aside from this, cats do yoga to relax with their humans. Because of their flexibility, I bet that they have mastered all positions already. Poor human, still stuck at position 5.
Cats have their own tablets, laptops, etc. Who knows where they get the money to buy those things. They grew tired of playing their yarn balls. Now they discovered a more entertaining application Catch the Fish. Who told you that humans are the only ones technologically inclined?