There is a surprising amount of survivors from this small scene, most notably the Lok Hau Fuk Restaurant (樂口福酒家) whose sign can be seen in the first picture - it's the blue sign directly underneath the plane. I took a picture of this place several years ago on one of my early explorations of HK and by pure coincidence was told a few years later that it was featured in a famous local HK film (directed by Johnnie To) called The Mission (1999). Anyway, the restaurant is one of the few columned shop house survivors that can be found in Kowloon City along Hau Wong Road. Here is my picture (taken sometime around 2008 I think).
It's not a match for the film in terms of angle but that doesn't matter because we can get a pretty good match via Streetview. The grab below shows that most of the buildings seen in 1968 (The Chairman was released in 1969 but actually filmed the year before) including the restaurant, the curved building on the corner with Prince Edward Road West and the tenement behind it further along Hau Wong Road.
The only real change in this area (other than the rather significant removal of the airport to Chek Lap Kok) is that the lower screen grab shows a clear view over to the airport area as the plane flies over. This view is now obscured (and has been for many years) by the flyover built above Prince Edward Road. You can see it below and compare it to the last picture in the series posted above.