This was released in the UK on September 29th & according to Amazon.com
'DVD Release Date: September 29, 2017'
When it states 'Usually ships within 1 to 3 weeks' probably means it's out of stock.
Saw this at my local cinema, sound & picture was superb, setlist long & varied. Renditions of Gilmour solo songs pretty much perfect. The Floyd tracks are mostly very good, one or two