I read some article about it early in the summer already. I don't think it's really going to change anything. Perhaps some major sites are closed down (ultimate-guitar.com, guitaretab.com ...), but surely not all of them. And besides, spreading and sharing music has been illegal almost from the beginning (i don't know the exact history of piracy though),but in spite of this, there are still some sites running, which provide you free mp3 downloading. So there will be even more underground guitar tab sites, don't worry.
And if young guitarists are still worried, download yourself a massive songbook collection, including about 20 000 tabs and so. Though players who are full of potential and enthusiasm, don't mind studying by training their ears like in the old days.