Note: the board, itself, isn't magnetic. It's just that magnets will stick to it.
From the campaign:
Our mission is to produce a quality table for the average gamer. We want to produce a quality gaming table that ALL gamers can afford. Not only that but a table where your models don't slide every time you move them onto a hill. The hill also doesn't slide when you move across it. Where trees can be placed anywhere and not fall over.The trees don’t need a base to put them onto. ***NOTE*** the painted table below is the prototype, finished product will arrive bare unpainted plastic, like the CG pictures above