The answer is the same as the answer to whether you should consider purchase of an electron microscope or some other really expensive and esoteric tool. If you have something you plan to use it for, it's worthwhile; if you don't, it isn't. Education is a tool.

Employers only care about your education to the extent that it enables you to do something that they need. If you're mostly going to be a web front- or back-end developer, the skills enabled by a MSCS may not be of that much interest to them.