One of the major issues with Laptop/Netbook/Notebook computers is what happens if you drop it.. Recall the IBM thinkpad commericials a couple of years back when they bragged on their sensor that could detect a fall and quickly park the drive? (It actually worked rather well, sadly something else broke, but the drive was 100%)
SSDs you need to drop a very heavy hammer on 'em to break em,,
The other thing is access speed. Some days the slower low power drives in portable comptuers make it seem like watching grass grow.
SSD's are greased lightening.