It is possible to replace a monitor with a projector in certain situations, but it depends on the specific use case and requirements.
Projectors have some advantages over monitors, such as larger screen size, which can be useful for presentations or entertainment purposes. Projectors can also be more portable than monitors and can be easily moved from one location to another. Additionally, projectors can be less expensive than high-end monitors, particularly if a large screen size is desired.
During the old days, there are also some drawbacks to using projectors instead of monitors. Projectors typically require a dark or dimly lit room to produce a clear image, whereas monitors can be used in any lighting condition.
But today has changed, the projector is smaller than human palm. It save space and bright even for lit room too.