As far as I can tell, there is no consensus whatsoever that this new Table: namespace is wanted or needed.
All I can find is a proposal from *2005* that suggests a complete WYSIWYG table editor which would incidentally make use of a new namespace. This was not advertised to the community, especially not recently, and has certainly not attracted the level of support such a change needs in order to be implemented. This is the first I and pretty much everyone else has heard of the idea.
Leaving the namespace in place is going to cause organizational problems as things which should be in template or article space end up there while there is no agreement on what the namespace should be used for or how it operates.
Please remove it.
Thanks,
Gurch