It is not meaningless but you are correct. Once Hillary is vanquished Obama will pivot to the right. Mark my words.
Do you know for sure who Obama is and what he personally stands for?
Oh for crying out loud...
Have you EVER seen a presidential campaign before?
What you've just asserted is essentially a basic FACT of how ANY Democratic candidate operates (the GOP candidate does the reverse). Swing to the party's ideological wing for the primary, swing towards the center (rightward, for a Democrat) for the General Election.
When it happens, please don't fash yourself. It's kind of like watching the sun rise in the east; oh, look, it's happening again!
The question will then be... as it is now... from where will they actually govern?
This election's an exception on the Right, because, due to the collapse of some candidates and the generally weak and anemic litter of candidates the GOP had to start with, they've selected McCain, who has a severe problem... his base (the right) doesn't trust him. So he's having to run right, hard, to try to shore up the base... at the very time when a candidate ought to be able to start distancing him/herself from the ideological wing.
I think it is going to be hard to move to the right, especially against McCain who is running as a solid centrist on economic issues and on the right on social issues. As for the war, well that is his trademark and he is all in, as they say in Vegas.
Moreover, it is very easy to depict Senator Obama as a liberal (look at his 2007). I think Senator Obama needs to talk about the economy and the economy, and the economy, and oh again, the economy. He needs to talk about it ad nauseum. And oh yes, he needs to find a serious answer to the question that McCain and his surrogate have begun asking which is: what would you do if there is a war in the region after we withdraw our troops?