Its "Tactics Training" mode seems to be a clone of Chess Tactics Server, except with a less realistic rating and perhaps requiring a subscription.
"Calculcation Training" seems like a minor improvement over the current Training Tab which allows you to hide the next move but doesn't allow you to take notes.
So far, nothing that would convince me to spring for it.
Check out the links below for video previews of Fritz 11.
Calculation Training
Tactics Training
Slider Control
Second chat window