There is a couple reasons why Jensen won't take off the gaming leather jacket just yet:

1. Gaming cards are their R&D pipeline for data center cards. Lots of innovation came from gaming cards.

2. Its a market defense to keep other players down and keep them from growing their way into data centers.

3. Its profitable (probably the main reason but boring)

4. Hedge against data center volatility (10 key customers vs millions)

5. Antitrust defense (which they used when they tried to buy ARM)