I used to be the kind of guy that would put on a screen protector on every new phone, iPad, even buy full body protection for my devices then one day I stopped and haven't looked back ever since. But IMHO it's just a waste of money. It's just good for business, I've never ever seen cases for watches but now that the apple watch is out, there's all this protective cases and screen protectors for it.
Being that the apple watch is aimed at iPhone users and there's tons of iPhone users that cover their iPhones with hideous cases, companies aim at those customers with their ridiculous protective cases and screen protectors for the watch.
Now don't get me wrong, there are good cases that enhance the product experience, such as apples leather case and covers, but, and I don't think I'm the only one that thinks this, there are so many ugly cases that kill the look of the iPhone, iPad, watch, even MacBooks.