The size of that is pretty incredible it looks like it is the size of a wireless card. It may be something that is being marketed towards businesses for now but we will see stuff like this in consumer devices as well. Netbooks, Slates etc...
I want one in a smart phone. That would be awesome to have a smart phone with a 64 or 128 GB sata drive in it. Not to mention on the SATA 2.6 energy usage is even lower and heat is basically no concern either.
Only problem with that Rapid is the mSATA slim is the tablet size drive. The mini, which is the one pictured and the right size for phones, onlyl goes up to 32GB.