Sibling Rivalry

A little bit of sibling rivalry is always good, i guess, and this is another manifestation of the constant one-upmanship between Dubai and Abu Dhabi.
Solar Powered Supertower to Eclipse the Burj Dubai?
http://www.inhabitat.com/2009/09/17/solar-powered-supertower-to-eclipse-the-burj-dubai/
But seriously, when is enough enough?