I’m not a medium format shooter but I do stay abreast of things in that area and I liked what I saw from Phase One when they launched the IQ series about 18 months ago. Today they have announced an upgrade to the new IQ260 and IQ280.
These new backs add built in Wi-Fi capabilities for reviewing your images instantly on an iPad using the Capture Pilot software. It also allows wireless control of the cameras. These things are as serious as it gets when it comes to photographic equipment these days! Built in USB3 for super fast downloading of files, machined from aircraft grade aluminum, touch screen, live view, focus masking …. you name it and the IQ2 series probably has it. Very impressive. Oh what I would give to slot one of these onto an Alpa view camera…… maybe one day 
At 30,000 or 40,000 euros you have to be selling some mighty expensive prints to warrant one of these.
