A page on Microsoft Support has apprenelty confirmed that a Surface Pro 3 is coming, possibly alongside a Surface Mini



From Neowin:

Microsoft is holding an event later this month to reportedly announce the Surface Mini, and rumors are swirling about what else we could see at the event. A report suggested that a Surface Pro 3 may be unveiled with next-gen Intel CPUs and it seems that Microsoft may have just confirmed that.

In a support document posted to the Microsoft website, Microsoft references the "Surface Pro 3 camera" in relation to the latest Windows 8.1 update. Of course, this could simply be a typo but given the recent report it would seem a new Surface Pro is on the way.

  More evidence of Surface Pro 3 emerges, could be released alongside Surface Mini