"target disk mode", which this claims to be taking a lot of inspiration from, pretty much turns your computer into an external harddrive - so you can connect another machine to it for direct access. This appears to be trying to accomplish the same, but over the network.
If you've ever stuffed up a machine so badly that the best idea you could come up with, was to take the harddrive out and work on it from another machine - this pretty much allows you to do that. But instead of taking the drive out and putting it an external drive enclosure, you just ask the stuffed up machine to act as the external drive enclosure.
That's usually the case.
I live and work on London time. If I want to have a phonecall with someone in the Philippines, I have to be mindful that 9am for me is 5pm for them, so I'll need to make the effort to start early to catch them while they're still at work.
Without timezones: If I want to have a phonecall with someone in the Philippines, I have to be mindful that their working day is 1am to 9am, so I'll need to make the effort to start early to catch them while they're still at work.
I'll still need to lookup when their working day is, I'll still have to adjust/account for it, and I'll still have to get up early / start work early to make that call. Getting rid of timezones doesn't get rid of that +8 or the affects of that +8, it just renames how we communicate it.