endless: for example once you have finished a book its finished you wont be able to read more on that book where as with new media if you read something their can be endless research and post about it.
Share: for example a book old media once finished might be given away where as new media once something is posted multiple people can re post it to others sooner or later that same post may become viral. teen vouge originally was a magazine where as now it has a website/ facebook page