You should be thankful for the fact that you are in a position to complain about something that you appear to think that you "entitled" to.
We are all entitled to it.
Bethesda said before Skyrim was released that Microsoft had exclusivity for 30 days for the first two DLCs. That indicates that the DLCs will go to the other consoles just at a later date. It is not an Xbox exclusive, it is a
timed Xbox exclusive. After Bethesda released that information, they became obligated to provide the DLC for all three consoles. No, Bethesda has no legal obligation to provide the DLC, but because they told consumers they would, it would be wrong for them to back out of it. Bait and switch tactics are anything but moral.
If they hadn't let this news out before Skyrim was released it would be a different story. But I bought the game on the PS3 (and later on the PC) knowing that I would eventually get extra content later on. If I was told that Xbox would be the only console getting the DLC, I would have bought it on the 360 instead. Since I was not told that, I have every right to have the opportunity to purchase the DLC on both of my consoles. You can't tell everyone the DLCs will come to their platform, let them buy it for whichever system, and then tell them, "Oh, never mind. It's only coming out on the Xbox. You will have to buy another copy of the game, possibly a new system, and the DLC in order to play it." Thankfully Bethesda is not doing that because they are not that inconsiderate.
I've spent $120 on this game and you can be sure that I am entitled to pay another $40 to get the DLC on both of my systems if I choose to do that.
EDIT: Just to make sure it's clear, I am in no way bashing Bethesda. Now that they've given us notice, I think they are doing their best to treat consumers right when it comes to the DLC. I'm just addressing the people who keep saying that everyone who is asking for the DLC is self-entitled.