There's minimal awareness of the MCSM in industry as it is (which is what you'll get if you pass the 2012 exams, not the older MCM), that awareness is not going to go up after December (and I suspect it's going to end up in the 'retired' section of the MCP transcript, not the active certifications)
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability