Uhmm.....
Peer to peer, no tying up CPU resources
Speed, two bi-directional data lanes at up to 10 Gbps, for now
That's actually too slow to be useful for things like high-end video cards outside the case and even a lower grade one would use all the bandwidth up. Thus, the ideas of having PCI external falls short. It's nice to say you have 10Gbps NOW, but if there are only a couple of Pro uber-expensive devices that can make use of that speed, it's just a niche. USB3 is already prepping for 2-3 years from now when consumer hard drives are expected to start catching up. The difference is that USB 3.1 will be dirt cheap at that time. TB will STILL be expensive (because no one is using it).
I consider this a negative. Daisy-chaining is a PITA to add/remove devices anywhere except the end of the chain and yet its presence discourages the creation of affordable hubs (if/when they do appear, they will NOT be affordable).
Simplicity, one connector for all peripherals and accessories
Yes, replace 50 cent connectors with ones that cost $30. That's totally worth it. NOT.

And just imagine trying to disconnect your mouse or keyboard in the middle of 4 hard drives and a sound card and a printer and then re-connect the remaining devices and then your friend wants his portable hard drive he brought back and do it again. Can you say NIGHTMARE? That's daisy-chaining for you. I have YET to see a single multi-port hub for TB so the possibility of it is moot to me.
But once you admit that USB is more practical for mice, keyboards, etc., then you might as well admit that USB 3.0 is more practical to since it's dirt cheap and backwards compatible with all that stuff and cheap hubs abound.
With optical connections, future speeds of up to 100 Gbps and beyond.
At what point? Existing computers with TB will not be forward compatible so you'll need new hardware. By then USB 4 might be out. In other words, it's just sheer speculation about if/when a 100Gbps or higher device will be available and whether it will be competitive at that point in time. I don't bet on dreams.
This could have left USB3 in the dust.
And cows can fly with a good deal of help. That doesn't make them competitive against birds.
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USB is dead people. Wireless won!
Seriously though. How relevant is USB3 these days with so many devices being wireless and people are storing their data on a NAS or in the cloud?
Wireless is SLOW and prone to interference. All three of my computers in my den are connected by Gigabit Ethernet. It's been around for over a decade and not even 802.11AC can beat it for low latency/overhead and usable speed. USB3 is up to 5x faster than Gigabit Ethernet. TB is 10x faster. I fail to see how Wireless is good for anything but portable devices that are often too slow to render a web page quickly so absolute speed doesn't matter a whole lot.
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For how many years we couldn't get a friggin HDMI port from Apple. Yet now we have TB ports that are basically useless. I wish my new iMac had at east one FW port - but no- I got 2 empty TB ports staring at me. And a 2 year old MBP without HDMI.
Get one of the $3 (with free shipping) adapters off somewhere like Amazon like I got. My TB port is happily driving a 2nd monitor with HDMI right now.