I said ages ago PG could have a site where you make up the tracks and they play back with a water mark then if they fit your needs you purchase the tracks and download.
I would rather have the 48khz 24bit audio files on a hard drive to use anywhere anytime and off line as how many studio computers are online. You want faster generate times not slower.
They did this with the ios and android apps where they just access the bbserver and send it chords and style info then the remote server sends the rendered file to the phone.