I agree. I upgraded from PS4 to Pro and had I been holding off and invested now I would have still gone for Pro but I don't think that is a bigger market than the number of people for which PS4 performance is more than good enough. I don't think Scorpio will change that, it's likely to be more costly still and the appeal as marginal if not more.
I used to be sucker for new, shiny and powerful. I'm still a sucker in that I will possibly line up to be among the first for a new console. But strangely, I am not sucker enough to want to invest in a PS4pro at this point, since my PS4 is more than adequate. It has great graphics, the games run smooth and well and I have greatly come to appreciate the quietness of the console sitting my livingroom. I'm still rather skeptical if the PS4pro remains as cool and quiet, but even so, why shell out another 400 or whatever it is (it isn't a lot mind you) just to replace the same for that smaller benefit in image quality, resolution (which I can't appreciate given I don't have a 4k set) and framerate?
If I wouldn't already own a PS4, yes, getting the Pro would be a no-brainer. But as it is, there just isn't enough incentive for me to 'upgrade' at this point. I will likely get a Pro when my PS4 reaches perhaps a 4 year age and there is a nice slim version of the pro (at that point, I would probably expect Sony to discontinue the old one at some point).