Metro: another tentative of user lock-in?

Another lock-in of users  format full of promise by Microsoft: Metro
Metro will be based on XML (eXtensible Markup Language), an open standard widely used on the internet.
read more here:
Metro is basically M$ response to the widely use Adobe PDF (Portable Document File) file format…There is some articles which try to explain why M$ is now trying to control PDF:  Microsoft gunning for Adobe’s PDF format? and  Microsoft Metro Threatens Adobe Acrobat, a very good article on what Metro may change in our lives.

Metro Specification and Reference Guide is available on M$ HERE

Note: If You ever want to create, read, modifiy PDF using #Java, there is a huge list of open source libraries and tools list HERE