Obviously the newer things are faster (second link threw some kinda certificate warning so I didn't see it), but really, what IS the point?
If I were connecting a hard drive or a fast flash/ssd drive (which really is the only excuse for having USB 3.0), I would probably be using SATA, not USB. I guess if you want to connect a smartphone or something to transfer files fast, it could be useful, but I'm not even sure if most support 3.0 (my new used Nokia 920 is 2.0). In any case, my x58 mobo actually has usb 3.0 ports which I've never used and don't foresee any need for even in the distant future. I have a hard drive drawer with direct SATA to mobo to connect HDDs to.
PCIe 3.0... again, no devices that really NEED that much speed today, unless you have some extremely ridiculous RAID card and setup to cap that. That's the only thing I can think of. AFAIK, the benefits for current and foreseeable video cards are little to none.
That displayport thing, again it's probably okay, but it originated from Apple which instantly makes it gay in my eyes at least. I'd rather some other standard succeed like HDMI 2.0 and then 2.0a/2.1 for 120hz over 4K than Apple shit.
I mean, again, those things are nice to have, but what's the point of pushing standards and tech which I personally don't even need right now, and won't need for the foreseeable future, and paying a shitload of money for them? (displayport aside, SOMETHING is really needed very quickly for 4K displays at least at 60, ideally at 120Hz or more IMO, hopefully with cheap chinese 42" TVs to follow that I can buy).