Its too expensive still, 2nd hand 1080 is a better value at under $400.
Indeed. Performance is great, but more than $450 and it seems pointless. If we're in that price bracket we're kind of screwed. I'm sure a GTX 2060 (doubt it will have RTX) will come along eventually but if it is $400-450 one has to wonder how much of a performance improvement it will be over a 1070. Certainly wouldn't be a worthwhile upgrade though if it trades blows with a 1080.
Unless Nvidia decides to be nice and make the RTX 2060 a 2070 minus ray tracing support / specific cores but otherwise performs almost exactly the same in non-RTS/DLSS games... yeah that isn't happening.