This is caused by the upgraded d3dcompiler.dll from the hololens branch. I'll email NVidia with details but so far this is a regression that breaks tessellation on NVidias. Assigning to Mircea.

Details: The new D3DCompiler produces different semantics for hull shader position outputs, and NVidia drivers do not seem to like that:

Old DLL:
// Name Index Mask Register SysValue Format Used
// -------------------- ----- ------ -------- -------- ------- ------
// POSITION 0 xyzw 0 NONE float xyzw

New DLL:
// Name Index Mask Register SysValue Format Used
// -------------------- ----- ------ -------- -------- ------- ------
// SV_Position 0 xyzw 0 POS float xyzw

Reproduction steps:
1. Open the "bug.zip" project
2. Open the "GrassShowcase" scene
-Observe that all of the grass is rendered at origin(0,0,0)

Note: The Domain shader can be found in "GrassTessellation.cginc" file at line 110

Note: Grass is rendered correctly on Intel and AMD GPUs

Reproduced on: 5.6.0a1, 5.5.0b10, 5.5.0b9
Not reproducible on: 5.5.0b8 , 5.5.0b7, 5.4.2f1
Regresion introduced in 5.5.0b9