1920 x 1080 screen - how best to read text

Hi

Now that 4:3 notebook screens are no more, I've tried to see if one can adapt a 1920 x 1080 notebook screen (say, 15") for everyday usage (web browsing, email, word processing).

The choices seem to be:
(1) Increase DPI to 120, 144, or even higher.
(2) Use larger fonts (OS).
(3) Use larger fonts (browser, say, Firefox).

Has anyone tried the above with a 1920 x 1080 screen? What's it like in everyday usage? If one can live with the occasional site font misalignment or other "distortions", would this be a sensible way to gain more vertical pixels to reduce scrolling, whilst text remains reasonably readable despite a small pixel size? In other words, can the above three steps partially compensate for a tiny pixel size when reading text?

Pixel Size Calculator
http://lcdtech.no-ip.info/en/data/pixel.size.htm

I also plan to position the taskbar vertically.

Lastly, would a well-engineered multi-touch touchpad help by speeding up vertical scrolling?

Thanks for your feedback!

Luke