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As an aside, the reason that laziness isn't as popular a strategy in Erlang is probably because it conflicts with the language's priority on (soft) real-time behavior. Being reasonably certain about upper bounds for time (and space) is very important in Erlang's niche.

Lisp's macros are foremost a cheap anonymous lambda - with-open-file, dolist, and the like don't need to be macros, but it's much more convenient and efficient than passing a lambda to another function.

Certainly, though, transforming code is more popular than introducing laziness.

You should check out Io. It is an OO language with laziness: http://www.iolanguage.com/scm/git/checkout/Io/docs/IoGuide.h... (see the Messages section).

The former.