Nvidia is cooking up something big for this year’s Game Developers Conference.

The company has sent out invitations for an event on March 3, the second day of GDC. The invites are from Nvidia CEO Jen-Hsun Huang, and they read:

I would like to invite you to attend a very special event on March 3rd.

More than 5 years in the making, what I want to share with you will redefine the future of gaming. I look forward to seeing you there.

The event will unfold at the Nob Hill Masonic Center in San Francisco, a few blocks away from the Moscone Center where GDC is taking place.

Five years sounds like the length of a design cycle for a new GPU. Coincidentally, we’ve seen unofficial reports about the company’s “big Maxwell” chip, the GM200, which has been spotted on a video card with 12GB of RAM. Hmm. I’m not sure a new high-end GPU would qualify as future-redefining, but it’d be nice to see nonetheless.

The event could also be about a Shield Tablet refresh. There have been whispers about a new version of the device powered by Nvidia’s Tegra X1 chip, which was announced last month at CES. The new silicon would offer more horsepower for Android games, and users would presumably still be able to stream games from desktop PCs.