Just to be clear, Vulkan is a Khronos initiative, not AMD. But it's cool, and we are members of the consortium. AMD is all about industry/open standards.
As for upcoming hardware announcements, you know I can't say anything official. But widely discussed is the upcoming Carrizo release, which our CEO said would happen in Q2. We presented a talk at the ISSC last week. The actual presentation slides are here
http://www.slideshare.net/AMD/carrizo-isscc
And some of the "buzz" on the web here:
AMD previews Carrizo APU, offers insights into power savings - The Tech Report - Page 1
AnandTech | AMD at ISSCC 2015: Carrizo and Excavator Details