If they put the same coating on the anode as what they put in the vacuum-fluorescent displays, it will have more than just that warm glow. It will flicker green.
From the photo, it looks like that may be the case: what are those green squares? The form factor is like that of a VFD.
It is quite suggestive of the intent that the part will be mounted such that it is visible through a display window in the equipment's case.
Absolutely. I have a strong feeling these tubes are never going to "sound" quite the same unless they look (and basically are) just like the genuine originals. The placebo effect is incredibly strong.
I'm surprised the government didn't outlaw tubes along with all the incandescent bulbs. That's just the kind of collateral damage they never seem to consider.