alt Hacker NewsA retraction from the gaming market wouldn't necessarily mean they'd still even produce the current crop of products. I could (and I would argue would) involve a complete shuttering of the GeForce brand, halting current production. On the assumption that Intel and AMD would follow, that wouldn't be an end of upgrades, but an end to the market.
Gaming is a larger market than Hollywood. Maybe it becomes a distraction for Nvidia, but someone will step in. That might actually be a good thing and why Nvidia wont do that: it creates an under served market in which newcomers can cut their teeth.