Conclusion: WinDVD improves the quality of DVD playback, but it doesn't support enough configurations for playing Blu-ray discs.
Pros: DVD upscaling. Web video search. Support all important video file types. Converts 2D to 3D. Anti-shake. Color and lighting correction. Screen capture. Plays 4K clips.
Cons: No mobile apps. Requires additional driver and codec downloads. Couldn't play Blu-ray on most laptops. Couldn't play 3D Blu-ray on an Nvidia 3D system where other software could. Occasionally crashed. Online movie search is near-useless.