I don't think anyone can really tell you if its worth it, as this really comes down to what you want and what value you hold on things. To get into VR and do it right, it will be expensive, but for myself, VR is far more than some peripheral that you can add to your PC, its a whole new way of experiencing games, and its definitely not going to be a fad. IMO VR will only work with certain types of games, like some 3rd person ones, but its mainly gonna be the best for any cockpit games, so if you are really into Elite and/or other cockpit games, then VR will most likely be for you. Not everyone loves it atm, but this is mainly due to the low res, and unable to see your controls or keyboard, but the low res will be fixed in time, and is already not bad in the DK2 if you can run with high resolution and super sampling, the consumer versions will be better.
When someone asks me what its like when they find out I have a VR setup, the best way to describe it is, when I was a kid and teen, I went to Disney World often and also to other various amusement parks like Bush Gardens, Universal Studios and many more, went on all the top rides and had an awesome time, yet none of these stack up to the experiences you can get in a good VR game imo. I look at it like I have a Grade A amusement park sitting in the corner of my room.