https://www.youtube.com/watch?v=-iudSnw--Y8
Automated rows of buttonholes and overlocking simple edges? Done in the late 1980s.
https://www.youtube.com/watch?v=Uk3kNnHZdl0
How much slower can you go?
https://www.youtube.com/watch?v=TBLEx-WaF9A
Pocket sewing. Again, done in the late 1980s.
https://www.youtube.com/watch?v=cSPb44jxA6M
Notice the video quality? Most of those machines use regular manufacturing automation techniques and seem to be designed in the early 1990s. They are not adaptable to different patterns/hems/collars/pockets.
https://www.youtube.com/watch?v=1GUhlfjqQmQ
This one is actually not bad.
There was a lot of development in automated sewing in the 1980s that was abandoned as a result of American and European apparel manufacturing collapsing and all the work being outsourced to Asian countries and Mexico.
I have not seen any robots that can do overlock or coverstitch of shirts, dresses or tights at full speed. Until you have that, Asian apparel factories are not going anywhere.
It is still not clear how sophisticated and cheap cut and sew automation has to get in order to make it cost effective as a capital expenditure. For example textiles was already a very automated field in the 1980s but US companies found out the hard way that capital expenditures for increasing automation was not worth it: http://www.berkshirehathaway.com/letters/1985.html
The one area of apparel manufacturing that does look like it will be fully automated (by definition) is complete garment knitting. The kinds of apparel it is useful for is sportswear, tights (thank you Lululemon for convincing women that tights are pants, sometimes it makes walking down the street that much more enjoyable), and certain kinds of dresses and sweaters.