The main thing that impressed me about this was that both the tray-load optical drive and the solid-state drive wore integrated in to the same low-profile chassis that would suit installation in to a laptop. There are many benefits that I see with this.
One would be that you could have a laptop specification that has both a large-capacity hard disk that is used for data and a lower-capacity solid-state drive used for the operating system and applications. It could then allow for battery economy and quick starts while the high capacity on the hard disk can exist for the user’s data and this hard disk is only spun up when the user’s files need to be loaded or saved.
As well, if Hitachi and LG move towards higher solid-state capacities, this could allow for low-profile laptops like the “thin-and-light” segment to have the SSD as the main system drive while supporting an optical drive.