Different screen resolutions are available for portable DVD players, but the difference isn't as significant as you would think. Since the resolution of all DVD content is 720 x 480, which is poor by today's standards, any DVD player you purchase should be able to display every pixel.  A few players have higher-resolution displays, which can come in handy if you have personal video files. If you have several personal contents with high-resolution, higher resolutions-based models (such as 1366 x 768) are something you can look for, but otherwise, any model can show your DVDs perfectly.