With the present trend of the mergers that are going on and the urgency on behalf of the companies to understand that interoperability is a key feature that will sell the package more is in itself enough of a proof that if not completely there we are atleast headed in the right direction. The recent understanding between PTC and EDS on Interoperability is another step in that direction. A lot of advances are being done in this direction and wherein companies refuse to give in tecniques like OpenDWG are being setup.
This together with the currently undertaken projects by Dasaults, PTC, AutoDesk in CAD data translations will bring us closer to the goal. One important thing to note though is that no matter what we say or are currently capable of doing with the translated data it is still imperative that we achieve it as close to possible. Just for an example round about 75% of the drawings existing in the market (all kinds) are in .dwg (AutoCAD) format. One of the primary reasons why OpenDWG was set up.