John Gruber had an excellent post yesterday about the Apple Watch.
This really gets to the point. I've already grown very attached to my watch but I could get by without it. In fact, I (along with the rest of the world) got by just fine without an Apple Watch for a long time. The difference it makes in my life is many small conveniences as I go throughout my day. The trouble is that the Apple Watch is like your first In-N-Out Burger. You know lived just fine without it before but after tasting it, you can't imagine going back to life without it.