My point would be what on earth for. Just so you can do this:

print "Blah $obj->{attribute} blah\n";
# instead of
print "Blah ", $obj->get_attribute(), " blah\n";
[download]

Seems to me all you achieve is to obfuscate your code, make it less maintainable, and slow it down.....

The original notes:
(to) interpolate them inside a string

Not much of a reason, but there it is.

It also could be used to speed up an application by developing with his simple data objects and then switching to plain old hashes live.