My own views are as follows
My own personal view is it would be a good thing for the "SPORT" as any sport has to have consistent equipment, rules, etc to create a level playing field with no advantage to anyone and also for ease of running events , knowing what to practice on , which table to buy to practice for the sport, public recognition of the table as "the ITSF table" etc
So effectively one ITSF spec table which is the only one approved for use in ITSF events which incorporated the best features of all tables would be a good idea although no doubt cause other issues like giving more power to the ITSF to dictate things and make money. However I also suspect it could lead to the situation we have in wrestling with a rival body to the ITSF being created with its own table and events etc so would not really end up with one table anyway.
However there will also always need to be tables with telescopic rods, glass tops , or other features etc to meet the needs of safety and operating tables to make money. Plus innovation is a good thinge.g.the x foos table for example is an interesting new variation making the game more arcade like http://www.xfoos.com/ .
There is also the question about where this would lead? would it tend to mean manufacturers over time all start to produce basically the same table , like a table tennis table or pool table plus other variations for local markets.
So no easy answer as usual!
I would be interested in what others think about this.