2.5" HD: 1 TB Storage Space by 2010?

According to The Register, Western Digital and Fujitsu expect to offer 2.5" HD featuring 1 TB storage space by the beginning of 2010. In the mean time, models with 750 GB of capacity should be released.
If one can question the real usage of such HD space in a notebook, HD manufacturers have found the way to maintain a large difference regarding storage space with the growing competitor SSD. Indeed, the main weakness of the latest is their limited capacity, and the premium price to be paid for SSD beyond 128 GB.