Most creators of digital records do not care tuppence about the long term preservation of their documents, which is why people in the digi pres field continually try to raise awareness of the issues.
Which prompts a question – does successful emulation undermine our efforts? If the creators of records believe that someone 75 years from now will create a succesful emulator which will run Excel 2003 (say), then there is no pressure on them to create their records now in any other format, is there? Creators can carry on creating records in closed, proprietary formats, to their hearts’ content. Every new report of a successful emulation project is yet another nail in the coffin of trying to persuade creators to use different formats.