Microsoft will be launching its next-generation Surface devices and peripherals on September 23 in New York City, according to an invitations Microsoft is sending out to press today.

At an invitation-only event, Microsoft is expected to show off the Haswell-based Surface 2 Pro and the Tegra-based Surface 2 -- products about which there've been a number of leaks in the past week-plus.
Microsoft's invitation doesn't specify whether the company also will show off a rumored 7- to 8-inch Surface device. But I'm hearing from my sources this mini Surface won't be part of the September 23 unveiling.
Microsoft sets Surface event for September 23 | Microsoft - CNET News