Only you can determine if it's worth the wait, depending on what your priorities are.
Initially, I would only expect a 10-15% drop in price, as the new tech moves into the price range previously occupied by the current tech. Over time it will go down, but you don't often see huge price jumps. The significant price drop in the i7-950 (from about $500+ to $300) a couple of months ago was kind of a rarity, in my opinion.
To me, the bigger question is whether you want to get the tail end of the current generation, and if/when you need an upgrade end up having to get a new motherboard/cpu; or get in on the next generation when it's released, but potentially run into teething problems with the new technology.
If saving money is your goal, you should wait. If you need a computer right now because your current machine is toast, you should buy now.