Heat helps to keep moisture out of the cloth. Even though the room is located in a desert environment, there are, unpredictable variables, such as, A/C issues, the use of food service steam tables, and even thunderstorms. Keeping the bed heated to at least 9F higher than the ambient temp eliminates those issues. And, it makes for greater consistency, faster play, truer banks / kicks, and precise ball action.
Heated tables are required for all carom tournaments under world rules. They're an absolute must for serious 3 Cushion players.
Interestingly enough, it seems that the first heated billiard tables were designed to slowly bring up the extremely expensive ivory balls to a sufficiently warm state (and maintain that temp). This was done to prevent "shocking" the ivory and resultant cracks. It was only later that the other benefits became apparent.
I'd love to see Brunswick and Diamond offer a heated slate option.