I have been a big fan of Blizzard for a long time. I've been waiting for Warcraft 3 ever since War2 was done with, and that was like 6? 8?years ago. And I've been playing Starcraft ever since it came out. I still play it on bnet today, about 3-4 games every day.
There are some games that are just so great, you have to buy them and have a retail copy for yourself. Perks include: having the manual, the additional remastered DVD and demos, being able to play on bnet, the art of warcraft book, the developer's signatures, and the retail box and CD.
If you don't like the game enough to buy it, that's your thing. I feel the need to support the developers, show my appreciation for this hella good game, and get those sweet ass extras, which is why I preordered it.
Considering how much time I got out of Starcraft (a few thousand bnet games) for $40 when it came out, I can definitely justify $50 for Warcraft3, which is why I preordered it, and why it's on overnight shipping and getting here on July 3rd (today!!!).