Suited speed cloth is the bomb for self dealt games. The only thing that would be better would be a cloth with SSC in the center, with a gaming suede racetrack (flush with the SSC of course. Since This would be a sewing / padding logistical nightmare, I doubt it will ever be done - but it is possible.
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The biggest issue would be with a seam, especially on a firm fabric like SSC. If the seam fell into a crease in the foam, then it could be hidden, but otherwise there would be a slight bump. It would be interesting to dissect Guinness's table to see if it has a sewn seam, or if it was bonded with an iron-on stabiliser.
I still doubt I will ever see it pulled off. I know I don't have that level of skill/exact tolerance. If Chanman or BBO aren't doing it, I'm guessing there's a reason (other than they never thought of it - until now).