Funny you should have gotten the 1080ti already. Buy what's available not what you don't know nothing about. She said Vega will launch end of July. Everyone wanted a date and now you have it. They said FE edition will launch end of June. I am pretty confident July launch is taking the HBM2 delay in to account. Otherwise it would have launched already since they have a working silicon in the FE edition. 2 scenarios HBM2 delay or AMD team is just horrible and can't get their shit together with drivers. But I think they are taking HBM2 ramp up in to consideration. They pretty much announced the date already. She specifically said it will be launched there. So I don't expect this thing to be too far out after July. Probably available mid July the latest but I expect hard launch from the way she said it. I actually think threadripper and Vega might hard launch together.
At very least i expected 1080ti prices to drop slightly. I used to be one of those that gets the best on release even though i didn't need it. It was more about bragging rights.
Thing is you pay premium because of demand, I've gotten wiser and wait a little. This also gives me much larger range of cards to pick from.
If VEGA did launch and it was anything like Ryzen i would have acted like child again and pre ordered a reference card! haha only because from i read supply might be an issue. =\