direct x diagnostic tool says I have direct x 12 with my windows 10 pro technical preview build 9926 now. My laptop did an auto update and I checked and there it was.
------------------
System Information
------------------
Time of this report: 2/19/2015, 22:10:50
Machine name: -PC
Operating System: Windows 10 Pro Technical Preview 64-bit (10.0, Build 9926) (9926.fbl_awesome1501.150119-1648)
Language: English (Regional Setting: English)
System Manufacturer: Acer
System Model: Aspire 5517
BIOS: Default System BIOS
Processor: AMD Athlon(tm) 64 X2 Dual-Core Processor TK-42 (2 CPUs), ~1.6GHz
Memory: 3072MB RAM
Available OS Memory: 2812MB RAM
Page File: 2255MB used, 3372MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 12
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
Miracast: Not Available
DxDiag Version: 10.00.9926.0000 64bit Unicode