I do think that's what's happening to a certain extent. However, oil prices going up and the home loan problem is putting a more far reaching slant on it.
I just saw a thing on the news tho that said until about the last 10 years nobody bought a home as an investment. Usually they bought a home to live in and sold it for little more than they paid for it. There was no thought that our homes should be a "cash cow."
Also, I think the fact that credit is so easy to get, or was anyway, has changed things. People don't live within their means anymore and it's bound to catch up at some point and come crashing down for them. Credit cards are a relatively new addition to the economical mix so it's hard to say where that will lead.