oops -- you're right.  I guess I was hoping that the Thunderbolt 2 port could support 4K at 60 Hz just like the Mac Pro. 
	
		
			
		
		
	
				
			HDMI video output
Support for 1080p resolution at up to 60Hz
Support for 3840-by-2160 resolution at 30Hz
Support for 4096-by-2160 resolution at 24Hz
 
 
		 
 
		 
 
		 
			 
 
		 
 
		
