I think that table top looks great. As it is, the table I have is not quite wide enough, just under 30 inches), so my boards have to hang out over the side a little bit. So there is the fear that any pieces on the edge territories or sea zones may fall off the edge of the earth. Also, I love the idea of holding all four boards in place so they don’t shift and split apart.
However, I would personally want the sides to be much narrower, like maybe 1 inch all the way around. I don’t use the game piece boxes and would really not want them up here because it would be wasted space for me. I put my pieces into these containers I found in the sporting goods section at Walmart. I think they were originally designed to hold fishing lures and such but they work great for my game pieces. I have one for each nation, one for the common pieces and even one for my combat dice, although with the addition of France and ANZAC dice I believe I will need a bigger one.
If you could make one like that with the smaller edge, for a cardboard one I would probably be willing to pay $20-$25. For one made of a more permanent material such a wood or plastic, I would go as high as $40, maybe even $50.