If you have a 1440 x 900 15" MBP and you reduce the screen to 80% in Firefox or Safari I think it's very close to the font size you'll find standard on the hi-res screens. Then to get an idea whether or not you're pleased with the font size try using your notebook at this setting for a few days. My initial experience with the small fonts on the hi-res screens in the area's were the fonts couldn't easily be resized I didn't like it at all the first few hours I typed on it -then- I started to like it, the fonts are smaller but sharp and crisp I was getting sold on the idea of the hi-res screens. Finally, after a few days using the laptop for long periods of time I found my eyes where "much" more strained, not because I couldn't enlarge the fonts on the page I was typing on it was everything else; menu text etc ... glancing and refocusing to view the smaller fonts became tiring on the eyes, making them feel dry/heavy. I then went back to the 1440 x 900 screen and the eye strain disappeared. I wanted to buy and like the hi-res screen, but not doable for me. This post was meant to help anyone who's trying to decide what to do but isn't near an Apple Store to take a look for themselves. The above font size should also be similar. *** Keeping in mind it will look more sharp and crisp on the hi-res display.