Yes and no…
Corel is mainly 2D but does use hardware acceleration if available. It makes use of OpenGL2.
Vegas uses 3D - it has many 3D effects applied to video that are rendered in real time at a lower resolution than the final render, and again uses OpenGL or DirectX-3D. Most of the transitions that involve page curls, zoom in/out, rotating cubes, etc. are all rendered using OpenGL.
Laptops. Seriously, just look at the graphics card sizes and cooling required, and imagine trying to fit that in a laptop. Integrated graphics systems are much, much, smaller, and use less power, and are really the only sensible solution for portable computing. When you decide to only support higher versions of things like OpenGL without allowing fallback to lower versions, even if it means a big performance hit, you’re really making a decision to exclude laptop users. Whether that’s a sensible business decision is a debate for another time, but you can replace the graphics system in a desktop/tower very easily - laptops, not really an option most of the time.