As with many of these, this is NOT a notebook for tabs. (this is very important to some) - the pages are meant to be ripped and taken out (most likely put on a music stand or your table).
To get to the point, if you can easily download the tabs everywhere nowadays and you can use GuitarPro for any song tabs, what is this block good for?
Certainly, some guitar teachers will send you stuff via email, however, some teachers prefer to use the old method of teaching you (and many would use your general notebook) - but with this, you have them covered.
Also, if you're a guitar teacher and the student perhaps likes these (instead of writing in a standard notebook and then tabbing it out there), this is a perfect way to chart down exercises, scales and whathaveyou to a student so that they can then learn them by looking at them.
As aforementioned, the pages are meant to be taken out and this is NOT meant to be a storage of all your tabs.