I have a passing interest in this kind of thing, for novelty's sake more than anything.
I might have to buy the next console that comes out and just leave it boxed up in the closet for a year or two, so when this stuff surfaces I can experiment. I feel oddly left out when I hear about this stuff and either don't have the correct version or just don't have the hardware itself.
I had a friend growing up with an amazing PS2 that basically functioned as a media server. Absolutely blew me away at the time.
This means it's probably not very useful to most end users who generally will have upgraded by this point (the exploit is about a year old), but it allows developers to continue working on the SDK for whenever another exploit is found, and possibly allows further investigation of the PS4, potentially allowing the discovery of new exploits.