Some things you only believe if you have tried them yourself. My MacBook Pro Retina offers one HDMI and two Thunderbolt ports which made me quite curious about the maximum amount of displays that could be connected.
There were people who already connected three displays to it, but I never saw anyone using VGA adapters instead of Thunderbolt displays.
This creates a huge desktop with a width of 6560px (or 7960px if you consider the true retina resolution).
Why all this? Well, because it is possible.