Well, @antpanlinux, he already knew about the dev kit specs…
However, @Alex_Leo, yes those are also the final dimensions, as confirmed here for example. (On that page, don’t be confused by 360x720, that is a compatibility value for software developers, that is then doubled for HiDPI displays).
I currently have a Galaxy S3 Neo with 1280x720, so with 1440x720 I’ll get 115,000 extra pixels. 
Keep in mind that the readability of a display is not only defined by the pixel count. The display itself is bigger than on the Galaxy S5. I don’t think you’ll have a problem.
Another factor is the font size. I’m pretty sure you’d be able to tweak it to your liking. Hey, it’s Linux after all! But I also expect them to have reasonable defaults.