While this may be common knowledge for many people, it's something I've been running into a lot with first time home buyers that I'm working with. Everyone is most concerned with the the number in the interest rate, and I've seen the sticker shock lead to many first time home buyers jumping to want to buy down the rate paying 1-2 points at closing.
While no one can tell you with absolute certainty what will happen with the market, it is expected to be cooling off in the coming 1-2 years and settling back at a more reasonable rate. In many of the cases, when doing the math out for the borrowers, it's shown that it will take 2+ years before the savings in your monthly payment make up for the money you paid in points.
If the interest rate market goes at it's expected to, you'll likely be refinancing in this time (or roughly in the same timeframe) and you may have cost yourself extra money at closing that you'll never actually recoup.
Sure, in some cases you might need to take this approach for qualifying purposes, but always make sure you're checking the savings in monthly payment versus the cost of the points to determine how long it will take to gain that return on investment. Don't just look at the rate as the end all be all for what is best for you, it very well may not be in the end.