Microsoft has scheduled an event in New York City on Oct. 2, where the company is expected to release new Surface devices.
Officially, the event is scheduled to update journalists on “how Microsoft is continuing to think about empowering every person on the planet to achieve more.” But it's expected to include the launch of one and probably multiple Surface devices—though not a Surface phone. It also may include some updates to Microsoft’s services, almost certainly including the Windows 10 October 2018 Update.
While competitors like Apple, Dell, and HP tend to update their flagship notebook lines on an annual basis, Microsoft has been a bit more infrequent. Microsoft’s Surface Pro (2017) was last refreshed in June of 2017, though the Surface Book 2 was released later in the fall. It’s likely that we’ll see a refresh of the Surface Pro, and possibly a new Surface Book, too.