Instapundit links to Marty Lederman at Scotus Blog who writes:

Even more importantly for present purposes, the Court held that Common Article 3 of Geneva aplies [sic] as a matter of treaty obligation to the conflict against Al Qaeda. That is the HUGE part of today’s ruling.

If we are going to win this War on Radical Islam we need to neutralize every weapon in the enemy’s arsenal. Given the Supreme Court’s ruling it would seem prudent for the United States to withdraw from the Geneva Conventions. God knows, the enemy sure doesn’t abide by the Geneva conventions.