For me, the benefits are clearer with the phone, which goes everywhere with me and is important to keep locked. With TouchID you can have the device locked immediately but you avoid the slide to unlock/enter your passcode game every time you pull it out. It's infinitely more convenient as your finger tends to center on the home button as you pull it out of your pocket and the device is unlocked before you even look at it.
Basically it adds a tremendous amount of security with no additional hassle. I'll be glad to have it on the iPad as well. Also, as the list of apps that support it grows, it will bring additional security and convenience. For me I look forward to being able to log into my password manager with it as currently it relies on facial recognition which is slow and requires a minimum lighting level.
Thanks for that. I do not use the pass code and have no real need for any security features on my iPad. I use it mainly at home and occasional trips out. Until I try it out it is not something I can see any obvious use for personally speaking. A nice to have maybe, but not if it costs extra!