Another absurd thread title. The Kindle, Nook and Sony readers are by default tied to DRM and their company stores (Sony less than the others, but still....). The iPad will be no different. Of course Apple would prefer you buy everything from iTunes, but the consumer that wants to can always get around it. I have had iPods/iPhone over 4 years and have never bought even 1 mp3 from iTunes. I have bought a few apps (good value) but never any music.
Don't worry about a portable electronic device being bad for your "freedoms". Instead keep a close eye on your government.