BookMyShow Stream offers movies in various resolutions: SD (Standard Definition), HD (High Definition), and 4K (Ultra High Definition) which can be played on your phone, laptop, computer, and TV. 

Most movies will be available in all streaming resolutions, however, some movies may not have certain resolutions due to licensing limitations. 

You can choose the resolution of your choice while renting/buying the movie. All the lower resolution options will be available if you buy/rent a movie in a higher resolution. More details about video resolution and compatible devices can be found here.