Depending on where manufacturing lands in roughly 5 years, and maybe if there's an impending PS5 on the horizon (or maybe already on market), I'd love to see a Switch-style hybrid redo of the PS4 Pro that I can take on the go with me. I'd see it as sort of the modern-day equivalent of the PSone+LCD screen that Sony released at the tail end of the PlayStation 1 era. Of course, I do think that form factor would require elimination of the optical drive, and with such an established physical media audience, I could see that being something of a massive problem not only for consumers, but for marketing the thing as well. And I really doubt it'd ever get approved or worked on, but maybe the dock could have an optical drive that can validate discs and allow the user to download the digital client? Who knows...
Still, after getting my Switch, I am actually kind of lamenting how much I was able to play Zelda (I was able to bring it to work with me and play in downtime!), and having a strong interest in games on my PS4 that I simply can't play at work does feel like a huge bummer. Remote Play is a fine option in theory, but the local ISP options I have available to me just don't make the cut.