Google announced a bunch of new hardware products today, including the Nexus 5X and Nexus 6P smartphones, the Pixel C tablet and new Chromecast hardware. If you live in the San Francisco area and are quick enough, you can get hands-on with all of these devices today for about an hour before they start shipping.
Here's the skinny from the Nexus Google+ page:
Come to Left Space Studios at 640 York Street and show us this post at the door to get a wristband for one of two sessions: the first session begins at 2pm, and the second at 3:30pm (each session should last ~1hr). Since space is limited, wristbands will be given on a first-come, first-serve basis (starting now!), and we'll be sure to update here if we reach capacity.
Source: Nexus (Google+)