I admit it sounds odd, but my point is: either you can fork out the cash for this or you can't. If you really have that sort of money lying around, then you have no problem going for a G-Sync and a 1080ti right now. And it doesn't matter if Vega arrives and turns out to be faster than Volta.
What I'm trying to say is: I think most people (myself included), can't justify spending that much money on gaming rigs. And when they do, it's a stretch. And when the next big thing hits (and it always does hit every other year or so) they feel numb. And when they've spent £500 on a monitor, they feel locked in.
If you feel locked in, then you've overstretched. I'm not saying that in the sense that you're in poverty or something. I'm just saying that even though you actually can afford a £500 monitor and card, you can only justify that to yourself once. Then you start waiting for Vega because you have Freesync and are frustrated and vent your frustration for your first-world problems here. I can understand it but I can't empathise, because that's just me.
P.S. Maybe my viewpoint is skewed because I can actually afford to spend £1000 per year on a gaming rig, I just think it's not really far from worth it...