I have to admit, I expected laptops to cover that niche you described (not too expensive and not shitty), but it seems to me that tablets with keyboard-covers will rather do that.
Which tablet? I was thinking you were talking about the Surface Pro 4, but its bargain basement model, which is actually not great (only 4 GB RAM, 128 GB SSD, Core m3 processor), costs over $1,000 once you throw the keyboard cover in. So, going down-market, the Surface Pro 3 when similarly specced* is $730, which is still a bit high.
* I don't think it's actually similarly specced, it just has the same amount of RAM and SSD space, but I suspect that everything is lower performing, and the screen is smaller as well. Too lazy to look up benchmarks though.
Yeah, I didn't mean anything specific (plan figuring that out myself). But I see iPad Air as a good enough $400 solution comparing to shitty-screen laptops. Just need to find decent keyboard for <$100.