Blender Apps were mentioned by Ton Roosendaal in his opening keynote at Bcon22 as one of the key new features and directions Blender would take in the upcoming few years. The design document for them has just dropped on the Blender Developers Blog, so head over to read and share your thoughts with the team!
— Blender Developers ? (@BlenderDev) November 2, 2022
Blender Apps builds on the framework first established by Blender Application Templates after 2.80, but takes the concept much further: Blender Applications would be completely customizable and packageable, and able to use Blender as a core engine for a multitude of uses. Check out the blog post on the link below.