If you watched today’s (June 13, 2017) livestream on Zbrushlive.com, you’d already know the following news:
ZBRUSH 4R8 IS AVAILABLE NOW
$795 USD (free upgrade for all registered ZBrush users, $695 USD upgrade for ZBrushCore users)
New feature highlights include:
Gizmo 3D transformation tool
3D Text Creator
Live Boolean for a non-destructive workflow
Vector Displacement Mesh
and more…
For complete details, Pixologic posted them here: http://www.zbrushcentral.com/showthread.php?207225-ZBrush-4R8-Available-Now!
! Thank You 
!