Quote -  I propose a simple formula, the best art is the one that last longer. Some say that a movie can be art.

Now we're getting somewhere!

(...there's hope for you yet. ;) )

Quote -  It has the drawback of that we don't know right away, we have to wait, but it is better than nothing.

I love the theory (seriously, I think time is an imperfect metric, yet makes the best filter and judge), but thanks to relative perishability of file formats, how do you think it would work viz. CG art? Opening a .jpg file 300 years hence may not be possible at all. Changing the format by necessity destroys the original pixels, even if the results are perfectly reproduced.

We're seeing some of the phenomenon even now, outside of art. For instance, open a Word Perfect file made in 1994. Or an Office 97 .xls file with Office 2010. Doing either destroys part of the original, making it lost. 

Now imagine opening a .max file in the year 2112...

A lot of the solution can be found in using strictly open file formats, so that future software can stand a chance of faithfully reading ancient files... something that proprietary formats may find impossible a century hence. 

The second part I want to tease out is the reproduction. Up until now, reproducing a work of art has always left imperfections. Now the fidelity is almost perfect... if it is done right. This may well alleviate some of the first part, but I suspect not all of it. Web-friendly .jpg files introduce compression, thus a loss of fidelity. Over time, file corruption happens. Different image processing apps will process the file differently.

 

Quote - Edit: And what happened to the bulk of all the "modernist art" that was so praised and lifted to the sky in the last 50 years after Picasso?

Quite simple: It got filtered. The collective judgement of Humanity was passed, and few pieces survive to today.

We can draw a different parallel, though: Consider Paul Gauguin. In his day, he was laughed at, his work considered pedestrian, and generally his paintings were thought of as pure crap. He was IMHO the Poser user of the 19th Century. Yet, in spite of all that, his work is worth a fortune today, and is widely considered to be pioneering and incredible now.

The judgement of time is one fickle mofo, isn't it?