Hey there ! Some of the pointers can include how earlier people had less leisure time due to the primary use of Man power and hired labourers and how mankind has evolved with science and technology .. and when they did have leisure time they used to spend it in informative and knowledgeable activities like bird watching and the studying of fauna and flora . . Earlier working in an office with computers was a very big deal but now you are not very famous if u don't have any gadget to play games on . You can also include that at one point of time people used to hardly travel by airplanes and that too only for important business but now it's a part of leisure ; holidaying in other countries is something that is included in your luxury budget. I hope these points will prove effective to build your conversation