I for one won't be downloading them because they're not in HD, and why would I want to watch a show as beautifully shot as Game Of Thrones in low-res?
Well. You might want to watch the leaked episodes before anybody spoils anything for you by telling you that King Tyrion beheads Aerys Stark at the wall in the next episode, or that Maester Jon marries Sam the Beauty in a lavish ceremony at the Green Keep in Casterley Landing the episode after.
Also, you'll probably really want to see Sansa Baratheon riding a dragon to sack Volantis as soon as you hear about it, and everybody so far has been absolutely wowed by Jorah Targeryon's heartfelt speech as he dies fighting Jaime Bolton whilst trying to rescue Stannis Lannister from the fighting in Lys.
Plus, Cersei Stark waving her tits at the Grand Maester is always worth seeing, and when Melisandre (the whore who worships the Drowned God) walks in on her and joins in it's both hilarious and terrifying.