How bad is the 1366x768 resolution on a 13" laptop?

I'm planning to get this Sony with a few upgrades (touchscreen, a bit more ram, maybe a better processor) but I'm a bit concerned about the screen. It is a 1366x768 display which I know a ton of people harp on but how bad is it on a 13" screen?

I am still considering the Yoga, the Aspire S7, and the XPS 12 but the price and storage space on the SSD have me a bit worried. Although I could just buy a SD card to expand it, I'd rather not spend the extra money (broke college student) if the Sony is good enough. I do plan on purchasing my laptop on Black Friday so I'll probably still have time to read some reviews.