A long harsh digital trip - final meter?

USB cable shouldn't matter with the data delivery, but might inject electrical noise as any other cable connected, especially connected to noisy computer on the other side.  Selecting cable with good shielding, to avoid ambient electrical noise pickup might help.  I would also choose cable without power wires (+5V, GND), if not needed (self powered DAC).

Same unfounded misconceptions people have about AC power. What makes you think the last meter is any different than any other? What reason would you possibly have to think anything is being "revived"? How would that even be possible? Eh?

Don’t kid yourself.  In this stupid hobby, absolutely everything matters at least to some degree. 

How do you know the last meter isn't really the first meter?

If it was actually a single ethernet connection from the data source to your DAC, then it would be the last meter of multiple hundreds of thousands of miles, but in this case, the digital network connection is passing through numerous digital devices which buffer and reclock the data. Each of these removes some noise and anomalies from the signal and adds others. 

So in reality, each connection between every piece of equipment has it's own affect on the signal integrity and noise. 

In this case, the last meter doesn't even use the same protocol and electrical characteristics as the preceding hundreds/thousands of miles. USB has it's own issues compared to ethernet and the cable requirements are different. 

It's unlikely that the USB cable is going to affect the integrity of the digital data unless it or the two devices you are connecting have a badly flawed design. But it is more likely that noise and waveform integrity affected by the cable could influence the sound of the DAC. 

Whether it's worth spending $500, $1000 or more on a USB cable is up to you. While I personally believe that cables make a difference to the sound quality, I also believe in balanced investment. For example, I don't think spending $2000 on a USB cable to connect to a $500 DAC is ever going to make sense. I've generally found that, after a point, spending my budget on better electronics results in more improvement than spending a ton on cables. Where you draw that line is obviously a personal decision.