Sigh... Let me remind all of you again. Most games don't even use of 50% of their storage capacity. This has been a fact since the SNES launched. HD graphics will need more space for textures, higher poly character models, and so forth. Even then most companies won't go near the limit of that format. Why?
It still takes time and money to fill anything to capacity. I wish more game companies were like Blizzard, Square, but they aren't. Most will give us Tony Hawk Pro Skater with 25%-50% of the format filled up. What was wrong with mutliple CDs like FF7? We not only got a game on 3 CDs, it was also only $40. If the companies can't move forward enough in standards, then giving them 1 terabyte is a total waste of money.