It's the usual Microsoft hype when it comes to these two versions of 7. The Ultimate is really not necessary unless you need the extra bells and whistles. As I said, being able to have the OS in Japanese is great for my wife and, if you are sharing a PC with someone who's native tongue is not English then this option is really good.
However, with hindsight, I would have gone for the Pro version as my wife never uses the main PC ( I won't let her near it) and when something goes wrong and you have to try and escape from the OS which is running in a different language, it can be really difficult.

Mind you, it does look good when I have visitors and they see me

running Windows in Japanese!