Who are you to decide deceased humans are not in the same league as deceased pets? I think that is better left to the owner or individual where they're placed. Maybe there's an old woman or someone out there who has no family left and her pets are all she has. Wouldn't those pets BE her family? I know I have lots of family but my pets are still family to me, and I'd still cry and be absolutely torn to pieces if one died. That is your opinion, not fact. So there are people out there who will see this as morbid. ( It's definitely morbid in my opinion )
The cat can not request something be done with its body. If someone said Mew, would you prefer to be buried or turned into a helicopter, I think I'd choose to not be turned into an object that's displayed like this. Also, I'm pretty sure no human can choose to be turned into displayable art. The government already has issues with "green burials" which are better for the environment, you think they'd be okay with bodies being turned into helicopters or works of art? I think not. Gee, Grandma died, I really miss that woman! Let's turn her into a helicopter so everyone can still see her and she's memorialized! That's not crazy or anything.... nooOoOoooo never....
This person seriously needs to seek some mental help..... That's not a natural way to grieve the loss of anything you once "loved."