Just buy it. I was on the fence about getting a VR system for ages, the price point and general lack of worthwhile games being the main reason. I'm so glad I took the plunge. I've not played anything flat screen since I got the headset. I likely will at some point as I'm a huge CoH fan and that doesn't support VR, but for games like ED, Project CARS and Dirt Rally it's a must have imo. Changes the experience like you can't imagine. Also, Star Trek Bridge Crew is excellent, especially in multiplayer.
What DefiledDragon says. If you can stomach current Rift price - its worth it. And considering earnings in developed countries and the fact that nerds here have multi-thousand $COIN setups with multiple monitors and buttkickers, 450 is not that hard to justify given the immense immersion it provides.
One more argument came to my mind - with current Summer of Rift discount, the userbase has grown considerably. Stores are reporting out of stock over and over again. That should be an incentive to all the developers out there (and damn you HTC for not lowering vive price one bit). With Fallout 4 VR coming out soon, I think/hope the floodgates will open. Older games now add VR support, for example IL-2 Sturmovik. 2017-2018 should be great for VR in general. And in 2018 Bethesda promised Skyrim VR which I will gladly buy.