Keystone correction is a feature of many digital projectors that allows the image to be displayed correctly on non-flat surfaces. Essentially, it means that the projector can "keystone" the image so that it appears rectangular, even if the surface on which it is projected is curved.

This can be useful for projecting images onto irregularly-shaped screens or for correcting for distortion caused by the angle at which the projector is mounted.

Keystone correction is a handy tool that can help to ensure that your projector always gives a clear and consistent image.

Home movie projectors have come a long way since the early days of film. Today, they are more compact and user-friendly than ever before, and they offer a variety of features that appeal to casual and serious moviegoers alike.

In the future, home movie projectors will continue to evolve, becoming even more portable and offering even more innovative features. As 4K and HDR become more common, projector manufacturers will focus on making devices that can take advantage of these high-resolution formats.

In addition, wireless projection will become the norm, making it easier than ever to share movies with friends and family. With so many exciting possibilities on the horizon, it's clear that home movie projectors are here to stay.