I think the VFX industry is rallying that cause. Years ago Autodesk ported many of their 3d packages home-grown UIs to Qt (Maya and Max) I'm sure part of the goal was to reduce their maintenance burden and assist with cross-platform support. They also have Python runtimes that allow GUIs with Qt. They moved from PyQt to PySide a few years ago, too. In addition to Autodesk, The Foundry's Nuke and SideFX's Houdini are in the same camp. I've heard they're (specifically Autodesk is) funding the development and the vendors are all working together and have deadlines in place for their own annual releases.
Everyone is using Python 2.7 and have stuck with Qt 4 because Qt 5 hasn't really offered any compelling features for them. I believe the dropping of support for Qt 4 spurred them to push for Qt 5, hence PySide support for it. There are early talks about Python 3, but that's a few years off.
Everyone is using Python 2.7 and have stuck with Qt 4 because Qt 5 hasn't really offered any compelling features for them. I believe the dropping of support for Qt 4 spurred them to push for Qt 5, hence PySide support for it. There are early talks about Python 3, but that's a few years off.