I think poor planning can cause all sorts of issuesWell yes, that's the question really. Are there going to be breakthroughs like that between 2019 -2021 ?
Tough to know really, you would expect Sony and Microsoft to know if such breakthroughs are going to happen in that time period.
I wouldn't be in a rush right now to get out the door first with VR being in a fairly unknown spot and RT on the rise.