I spend a lot of time working on a laptop because of my mobility requirements but currently only have a 120GB HDD in my main work laptop and I'm limited to only a portion of that because I need to store some important pictures that belong to someone very close to me (long story). The SSD would help me work faster (I do a lot of coding and run dev web-servers and the like off the machine and sometimes need to crunch a few gigs of data for my own projects), it would also make the laptop much more resilient against accidents during transport. It would also help me transition to a setup where the HDD can go into a computer case which mostly stays at home in a semi-RAID configuration so I have some form of backup like Linus advocates for.
I'm with everyone in the belief that SSDs are the future of personal computing storage in much the same way no one has magnetic tapes in their personal machines.