many of the super-rich are having them built -- complete with huge comfy seats and cup-holders , eardrum-blasting surround-sound systems , massive screens and even cocktail bars and popcorn-makers .
celebrities with a home cinema include the sherlock actor benedict cumberbatch , retail tycoon sir philip green and chelsea fc owner roman abramovich .
means the beckhams could easily fit 20 seats or enough for their family of six plus friends .