[raphlinus]

It's important to make the distinction between subpixel positioning and subpixel (RGB) rendering. I'd personally say yes to the former, even at high dpi, and no to the latter if you're on a mobile device. The kerning errors you get from quantizing the position of glyphs to integer pixels are, to my eyes, a noticeable degradation of quality.

[criddell]

Do you know if the layout engines for laser printers do subpixel stuff?

[microcolonel]

Most laser printers tend to use PostScript (a Turing complete language), which does not know about displays hardly at all. It does arbitrary positioning.

[criddell]

> It does arbitrary positioning.

So are you saying that whether or not subpixel effects are accounted for is implementation dependent?