Antares autotune, to me, demonstrates the unique nature of the Theremin with regard to intonation.. There was (is) a good Thereminist [i](this is not just my opinion, it was the opinion expressed on Levnet recently by an advocate of "raising the bar")[/i] who recently posted performances on Utube - His performances were not shit, (probably well above average in terms of intonation) but he chose to polish them with Auto-tune.
The result was perfectly in tune, and perfectly dead!
I do believe there is something about the Theremin which is lost when intonation is perfect.. whether due to electronic processing, OR due to PERFECT playing.
Regarding performances:
I think there are 2 sides to this 'coin' .. Yes, there is a lot of absolute rubbish being posted on the web - but this does not only apply to Theremin performances... The main difference, I think, is that the Theremin community probably makes more noise about the abysmal 'quality' of what people are producing than, for example, recorder playing enthusiasts do about the abysmal quality of recorder 'performances' on the web.
This has a knock-on effect.. The people who produce crap Theremin performances are not aware they are producing crap, even if this is brought to their attention - to THEM, what they do is great.. They will not change their ways - and why should they?
BUT - There are those who may well be good enough to be enjoyed by many others, who, because they are focussing on almost unobtainable "perfection" and because of fearing to fall foul of the Theremin critics, do not post anything and hide themselves away practicing playing scales.. (!?)
[i]"I have worked my whole life as a professional musician. Someone here recently challenged me as to why I didn't have any youtube videos posted. My reply was that I do not have enough mastery (in my opinion) to post something of quality. This despite the fact that my playing is much better than most of what I have seen on youtube." - Eitherspiel [/i]
EDIT> I feel the above is sad (although I agree that a person has absolute right to withold publication of their art for whatever reason)..
WE (those who enjoy GOOD Theremin performance, and do not go into Anaphylactic shock when we hear a bum note) are deprived when those who can play well dont publish, whatever their reasons.
And it is, in my opinion, often an irrational obsession with "perfection" which is the major cause of our deprivation, and the REASON why most Theremin performances seen on the web are crap.