They have obviously been out to get the current federal sentencing rules (on which many state sentencing schemes are based) for some time now. Major changes, they are acomin'.
Yes, major changes are coming .. but it won't be because the USSC made some eroneous ruling .. it will be because the public is fed up with this judge activism garbage and we are going to force our legislatures to stand up and be counted over it.
When USA judges start using INTERNATIONAL LAW to adjudicate issues - they are off the wall and NEED TO BE REMOVED FROM OFFICE - and the legislature can do that!