actually no, the only real reason is cost and cheapness, and is more unstable than a hard drive i have yet to see the proclaimed said aforementioned solid state drive cope with the hostile operation theatre of the computer personally i think its a mistake to abandon disc type hard drives simply because the platter packs can happily spin around for years before any issues.
the cheap alternative is like MP3 or those horrid ipod that we hear so much about, the fact is like with CD if you go from cd to mp3 all your doing is swapping one type of secure and stable platform to an unstable platform and if the mp3 fails you loose the lot.
this is the same for the solid state its a pile of memory chips and that is all the fuss so nothing new then!
except there completely not repairable in any case and are more cheaper to make so the greed of electronics manufacturers happy to keep telling the public you need this the new standard is going to be this and so on are just doing what intel and amd keep trying to do, that is re-invent the wheel and when every one has dumped there old hard drives in the bin and got a solid state drive then those will have to be made obsolete as well.
wait and see.
a disc drive is mechanically simple, and no complex bits that can burn out with consistent loads wipe read write standing around talking to no one and so on.
ask yourself what happened to all the old tape readers? or old floppy drives? anyone remember the old 5.24 inch drive?