Why does Tasker make NFC more appealing? Forgive my ignorance, I don't know a great deal about either. Thanks,
With those NFC tags you can program each of them to make your, or anyone else with the same NFC reader app, do a few simple things. With Tasker you can make complex tasks that trigger based on "contexts" which could either be "states" (e.g. you're at a specific location, it's a certain time of day, etc.) or "events" (e.g. you get a text message, you unlock your phone, you perform a specific gesture etc.)
One of the things you can have a NFC tag do is perform a Tasker task (essentially making scanning any specific tag a new "event). So with Tasker you can have a NFC tag tell your phone to perform one, or several complex things and you can have those things change depending on the state of your phone. You could put a single tag on your key chain that, while at work, toggles your phone between "meeting" mode and "at your desk" mode, while in the car sends a text message to someone with your GPS location and while at home it announces your "to-do" list for you. If you have some home automation system you could put one by your Lay-Z-Boy that dims the lights, turns on the TV and opens your TV remote app. These are all things that you may or may not want to do at any given time while at a specific location.
tl;dr - Tasker will allow you to do much more complex things with NFC tags and NFC tags allow you to be much more situational with your Tasker events.