For sure, but I'm not such a typography nerd that what's on Linux is unacceptable to me. Ultimately I'm going to get my work done however is most efficient; that just tends to be Linux. My Mac (which I'm using now) is great for web browsing and reading articles. I'd sooner use my Kindle for that than my Linux laptop though and often I do.
Once Apple makes a retina iPad around 10 inches and lets me use my own USB keyboard, I'll never use anything else. If that iPad Pro rumor pans out, it'd better have USB.
I've been impressed that typography on Linux isn't as bad as Windows, but it's still got a long way to go to measure up to Apple. It's not just clarity and accuracy of the typefaces themselves, but subtle details like how the ligatures (things like how "fi" and "ff" are rendered) are properly applied.
Typography is one of those things that, once you've seen it, you can't un-see it. You can only try to not care.
Apple's not interested in adding USB to the iPad since Bluetooth already does anything USB can do and more, at least from the perspective of a consumer. If you want a portable USB-capable tablet, maybe you want a Surface Pro. That thing would be pretty awesome if someone can Linux it.
In any case, you can already use pretty much any Bluetooth keyboard you want, and there are a large number of third party ones to pick from.
Once Apple makes a retina iPad around 10 inches and lets me use my own USB keyboard, I'll never use anything else. If that iPad Pro rumor pans out, it'd better have USB.