Attica Chair by Studio 65 for Gufram  

Probably
Probably about as much as Disney:

Unless the picture....
is well preserved the chances that a polyurethane product still exists in 4964 years, are so slim that I would not worry about it. On the other hand, there are so many re-uses of Greek and Roman architectural elements around that they might conclude that the Greek/Roman civilisation lasted into the 21st century..

Like...
...those huge pillars by Ricardo Bofill:
http://www.ricardobofill.com/en/6209/Architecture/Antigone.htm

Finnish Image magazine told...
...how pop artist Jani Leinonen decapitated stolen Ronald McDonald statue.
Will Little Caesars Pizza Man be his next victim?
What if Roman Empire didn't fallen? If steam power was taken seriously, The Industrial Revolution would have started in The First Millenium? And conquest of space centuries ago?
And most importantly, human rights could have been improved, if human slaves were replaced by robots?
http://www.littlecaesarsstuff.com/

Jyri,
I am not sure about ...
Jyri,
I am not sure about your statements, but I do like the Studio 65, Capitello chair with Attica table and chair for Gufram.
I own the Gufram Cactus & Sassi rocks. They are both usable (as a coat rack and a seat for changing shoes in my entry hall) and they make incredible statement pieces.
I believe there is an old line that says "if my grandmother had balls should would be my grandfather".

They will almost certainly find
composite reproductions of rocks confirmation that our civilization had passed its prime.