I don't see much use of Java on the desktop these days (aside from a few specific applications)
For end-users maybe not, for developers a lot of tools are Java, with IDEs at the top of the list. Say goodbye to Eclipse on Mac??
The faster the roads are, the farther people are willing to drive. So an increase in driving counteracts the hoped-for savings to some extent.
See various papers on "time travel budget".
See also Rebound effect and Downs-Thomson paradox.
'any application that pleases you' to play music and video
Scientists will study your brain to learn more about your distant cousin, Man.