Hollywood is having a love affair with natural disaster movies right now. It would probably decrease. There wouldn't be anyone left to buy them. When all the troops came home after World War II and reunited with their loved ones, we had a population boom soon thereafter called the Baby Boomers. With all those new people being brought into the world, the demand for consumer goods increased.
More people buy more stuff.
If you expect the price of a good to change in the near future, your demand right now changes. The price hasn't changed, but you expect it to. If you are in the market for a new 2000 model car, you probably know that when the 2001 models are brought in, the 2000 model will go on sale. According to your sources the 2001s are going to be distributed in November. The price hasn't changed, but you expect it to, so you wait on your purchase.