Does your 4 year old cell phone work?
Depends on what you mean by "work." It doesn't offer a lot of features that are practical conveniences (such as cameras). It has substantially less battery life. It gets substantially less reception, is heavier, and is inferior in lots and lots of ways.
No and people KNOW that it will be cheaper and they still buy what they want and need when they want it or need it.......waiting is a banker's bogeyman they like to throw up.
Just because you repeat a wrong statement doesn't make it right, I'm afraid. One of the major issues in buying computers is that people
do not buy excess capacity, precisely because it will be cheaper later. In almost any other purchase, people tend to overbuy (as an inflation hedge); if we need 20,000 square feet of office space, the company will build 80,000 square feet (and rent out the rest until the company grows into the building). If we need a 10,000 liter storage facility, the company will buy 20,000 liters worth of tanks so that we can keep up with expected growth in capacity.
The notable exception is computers. If I need 2PB of storage, I will buy as close to 2PB as I can, precisely because if I need another 2PB next year, it will cost half as much.
Moore's law is a density issue
No, it's not. Because "denser" transistors are by definition smaller, and smaller transistors are faster, cheaper, and require less power.
It topped out a while back and we simply add more cores now....
Nonsense. The reason we "simply add more cores" is because Moore's law allows us to make the cores smaller, so we can (literally) fit more cores into the same area. If you buy a quad-core CPU, it comes on a single chip, just like a single-core CPU used to (and before that, like the fixed-point processor did and you had to buy a second chip for the floating point processor).
Far from topping out, Moore's law is the REASON we have multicore processors.