Life pretty much sucks without some jokes and a little laughter.
This is, in a very real way, relevant to my interests, as someone who has just run out of space on his existing edit SSD.
For most people storing media, a large (~3TB) spinner is ideal, paired with a 256GB or 512GB SSD. But for some people, especially in the content creation business, a 960GB SSD is quite alluring.
My personal (developer machine) calls for around 400gb for VMs and databases. Useful install media (which, sure, is largely optional) adds another ~30gb. If I want a few games on the machine, that's an extra ~20gb. Already, that's around 450gb of space used, and that's being pretty space conscious.
Huge drives like this provide convenience. If I want to back things up locally (full VM snapshots, database backups), there's enough space to do that without having to worry / shuffle things off to a NAS (which may or may not be an option if it's a laptop and you're on the road), and HDDs don't cut it performance-wise.
Anyone using a laptop with a single drive and lots of photos or videos will. Photos and videos are the real drivers of most people's HD needs.
The local cable access station in Portland, Oregon[3] uses a mix of Aja Ki Pro [2] and Cinedecks[1]. The Cinedecks use SSDs like cartridges, and will record 1080p 4:4:4 ProRes.
The Cinedecks are real nice to be able to use a couple of 512GB SSDs like a cartridge and pop them in and out to record anything from a City Council / School Board meeting or for public use of recording a 3 camera shoot of a live performance.
The Ajas not so much since they use a proprietary shaped cartridge which has SATA connector to dock into the unit. They also have a FW800 connector to off-load data off the drive when undocked from the Aja recorders. I believe you can swap the drives in the plastic housing, but it's not as slick as just using a bare SSD.
[1] http://www.cinedeck.com/ [2] http://www.aja.com/en/products/ki-pro/#overview [3] http://www.pcmtv.org
I would strongly consider putting this in a computer, only to make tasks like video editing faster. Using tablets all of the time makes my tolerance for poor performance very low ;)
However, I think the most important reason for me is my huge collection of Steam games. Currently I have Steam installed on a HDD instead of my SSD, because my SSD is only 256GB and Steam is over 800GB. Heh. :P
Now I'm just looking for a nice 2.5" enclosure with a built-in RAID controller and eSATA or USB 3.0.