The second consideration is cost. 4K projectors aren't coming down in price as quickly as TV panels are, and that means you'll usually pay more for a good quality 4K projector than for a good quality 4K TV.
The second consideration is cost. 4K projectors aren't coming down in price as quickly as TV panels are, and that means you'll usually pay more for a good quality 4K projector than for a good quality 4K TV.