Like bobberfett said you are too focused on the details. What is your actual idea?
It seems like you want to sell a highend gaming experience. So try and figure out how to profit by offering a highend experience. 4K is only one way to do that. Have you considered offering the following at higher prices in addition to 4k?
- Eyefinity/Surround Gaming setup - 3 1080P monitors and charge more
- 3D Gaming - charge more for goggles
- Low latency gaming - for those who think they're pros offer fast 120hz setups for twitch games
- Alcohol - have a bar - sell over priced drinks
- Barcraft - show competitive matches for LOL, DOTA, and SC2
- VR Games - Get oculus rift setups - charge and arm and leg more for groups
- Monthly charges - as you said - offer the ability to save games. Charge $x per month for an account
- Setup tournaments of popular games - LOL, DOTA, SC2
- Stream your tournaments -raise publicity
These are just something's you could do to carve a possibly profitable niche.