Your comparing apples to oranges here. ekainjo stated how no one should be surprised that such a powerful device can run a Sega Saturn emulator full speed, and I said why shouldn't someone be surprised.
No, don't change history, you said
And considering a cheap TV set box can do it, makes it even more spectacular
You called the nVidia Shield TV a cheap set top box. I pointed out that it wasn't cheap. I linked to several devices that are cheap that (probably) can't run Saturn emulation. I pointed out the difference between a weak and cheap device vs a more expensive and obviously powerful device.
Once again, the nVidia Shield is a very powerful device and this is reflected in the price. It is not cheap, it is priced according to its very high specs. Because it is known to be so powerful, because it does cost so much, considering how well the Pandora, technology 7 years old, is able to handle Saturn emulation (such as it does) it is completely expected that the Shield, a very modern system, is able to run it at full speed. It would be entirely unexpected, a sign of major problems, if it couldn't.
This does not mean it isn't impressive, it just means that you shouldn't be surprised. Now, if someone gets Saturn emulation running full speed on one of the current sub $50 devices, that would be unexpected.