Firstly the term and extension don't fit together, "pokies" is an Australian term, .com is an International/American extension. The logical name for the market would be 3dpokies.com.au.
The second issue is, is there any market and will there ever be? Even say pokies.com.au, where is the logical use for that which is also legal?
Thirdly can you imagine buying glasses and a new monitor to play to pokies in 3d, why? It isn't like you are watching a blockbuster movie. I don't think gamblers are going to care.