i find TrueTone the latest gadget gimmick. i can see where the average user might like it and where it might 'look cool' and give the best all round optimum screen gamut, but as an artist and photographer i find this an option completely and utterly useless. the idea of the device making up it's own mind where and when my white balance should be effected, especially when in a professional situation is infuriating and hopeless. i love, and will always have my iPad screen set to a constant contrast/brightness across the board at all times in all lighting conditions. this is so so important
but as i say, for the average user it's a very decent option.
Well, to be fair to Apple, they didn't say anything about art or photography whan talking aoubt TrueTone. That is entirely my own speculation based on what little I know about traditionaly art media; how the choice of ambient light can effect the artists color perception.
If someone is working entirely from the iPad, that probably doesn't matter. The eye will adjust to that enviroment. However, if someone were trying to duplicate a natural scene or was using physical media as a reference, it might help; since it would prevent the eye from having to contantly shift between different color casts.
I don't know if anyone actually uses their iPad this way, and there are certainly ways to work aound the issue (take a photo, use a color sampling tool), but, if someone ever had the urge to use their iPad like an old fasioned canvass to paint a still life or nature sceneb I think TrueTone would be useful. Well, provided they also cared about (and had the eye for) accurate(ish) color reproduction.
Note: Another factor would probably be the final media presentation. A purely digital piece of art is almost impossible to control, since every screen is a bit different. Printed art would be more suseptable to bad color choices. Of course, youc an always post process your art for printing, and filter the color cast anyway you like. So maybe it's all moot, and the digital art age has simply made ambient light passe.