I am a newbie just got my IFR but I do not see VOR's and airways vanishing anytime too soon. I could be wrong, but I hope not. I think it has been demonstrated that GPS is great as long as it is functional, but even so the FAA has demonstrated pretty clearly that plan B's are a must. Certainly, they are still making new ILS's, I know at my home airport has one being built over the next year or so. Existing VOR's are relatively cheap, and if the GPS system, which I believe is still controlled by the military, goes out suddenly (for example maybe from an unexpected solar flare) and there is no ground based back up, the chaos would be unbelievable.
Maybe I am wrong.
As to the OP why would you want to wait. Even if it does change 10 years from now, who cares? You are flying now. It would be like saying not to fly a six pack because glass screens are available.
Doug