What's cool about the MB1 is that not only do you get the 4 VFO's, but you have the ability to use the IQ from the 2 receivers as well in third party applications, including 2 skimmers, one per receiver. The MB1 has a superb set of knobs and buttons as well as the ability for two addon displays.
The other cool thing is that since the computer and radio are integrated, in an almost ironic twist, it's actually easier to facilitate full remote operation with Software such as NoMachine because your using the MB1's screen and all the software you want to run on the MB1 is right there running in real time with the radio, so all your doing really is sending screen update data and then audio back and forth.
Not sure people really thought about how capable this makes the radio for remote ops. NoMachine runs on android and iOS so you get a full featured SDR interface using ExpertSDR remotely on your tablet, pc, etc. Very handy if you think about it!
I think it's ironic because the industry is trying to separate the computer from the radio and do the signal processing in the radio.. so a lot of resource is being placed into programming all the functionality in to the radio. So one might think that the MB1 is a legacy approach, but it's actually rather ingenious to just put the PC in the radio because not only do you get the upshot of processing the signal but you get a whole windows PC to run all the current ham software you want, and a built in radio server. It really solved a lot of the problems that veteran SDR users were clamorong for and hence the effort to separate the radio from needing a computer.
Pretty slick when you think about all this and definitely something to noodle on for future design consideration. Makes you wonder if Expert Electronics doesn't in reality have a novel approach to SDR computing.