Not a lot of people decide to go with a surround 1440p PC setup; it's usually just 1080p surround, going ultrawide, or even 4K. Surround gaming is definitely a different experience compared to your standard single monitor setup, as the extra peripheral vision can help in simulators, FPS's, and even RPGs. Whether you enjoy the extra vision is up for debate, but personal preferences...
So why not take the plunge?
The immense horsepower needed. VRAM usage is a huge issue beyond 8 million pi