For values of 'better' meaning '30% lower', sure.

No. 300 DPI printing is not the same as 300 DPI on screen, because one dot on screen can be multiple colors (depending on the color depth, typically 16,777,216 can be expected), while one dot on paper is, well, either black or white. So for the same DPI, screen outperforms paper. 250 DPI on screen will definitely beat 300 DPI on paper.

After a quick search, I see you can get a 1200 dpi black and white laser printer for less than $100. Colour printers can overlay colours or pre mix the ink.

And modulate the size of the dots.

Unless you want to print every web page you want to read on the go and carry them in your backpack (get a BIG one).

I'd rather have a better screen than thinking about printing.

So a color laser printer do dithering?

Yes. There's a reason why photo printers are inkjets; you can mix liquids on the paper. Toner does not mix.

yes awesome! since your fingers don't get any smaller, maybe that's why they decided to put a trackball on a cell phone. perhaps there will also be a separately sold stylus.

You can't use a stylus with a capacitive screen.

You can with wacom screens which are capacitive and support both stylus and fingers

Cintiq displays require a stylus. There are buttons on the side you can tap with your finger though.

well, there are styluses for built for capacitive screens, check the local Apple store POS.

yeah, but unlike paper you can't see anything on it in bright sunlight

It's an OLED, which tend towards being extremely readable in sunlight.

True. And in case the sunlight is strong enough to make an OLED unreadable, you should probably not reading papers either -- that's very bad for your eyes.