Question:

Windows 7 machines, VDA 7.6.300 netstat -ano does not show 1494, 2598 listed as listening.

Answer:

Windows 7 - Desktop OS will listen on Port 1494 only when request comes in from StoreFront or WebInterface.
netstat -ano on Windows 7 will not show 1494 | 2598 listening up until the time of ICA launch.
netstat -ano  on Windows 2012R2 - Server OS will be listening on Port 1494 | 2598 regardless.