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You sure about that? Desktop resolution is 72 ppi
Whose desktop? 72 ppi would be a 1080p screen at 30". Or 1366x768 at 22". That's pretty low ppi even for your average Joe. They also said their desktop. Though I don't know what resolution/size it would be to beat 266 ppi. I'm guessing a 4k laptop screen, as a 4k 24" monitor is only 183ppi.
Yeah I use one of those 15.6" portable monitors. It's because I have a medical condition that requires me to lay in bed for ~all day ~every day, but I can no longer use actual laptops due to how fragile they are. But I like the laptop form factor as "something that can be used in bed". So here I am.
The monitor itself costed around $70 for 4K. It's only sRGB, but it's honestly the most accurate sRGB display I own aside from my phone. Even beats my laptop, because the laptop is 8-bit Adobe RGB.