Archive notice: This article was originally published on June 28, 2013. Links and embedded videos are preserved as part of the historical record.
Without wasting many words, here are the videos about the new features:
SplineWarp
This explains the extent to which the new features improve the workflow.
ZDefocus
New in Nuke 7.0 is the ZDefocus node, a major upgrade of the Nuke Zblur node.
DepthGenerator
Depth-pass calculation has also been improved, with changes to the workflow and new output options.
Primatte 5
Four new tools are presented here: Auto-Compute, Smart Select BackGround Colour, a new Adjust Lighting feature and a Hybrid Matte feature. All four are intended to accelerate and improve the keying process.
Further information about Nuke is available here.
Further information about trainer Steve Wright can be found on his website: www.swdfx.com