If you buy the disc version of omega, it will install the game onto your HDD in 5-10 seconds but you have to download patches if there are any
the back of the sleeve says it requires 24gb of your HDD
but with digital pre order you can pre load and have it ready before it launches so you can play it the second its released
Sony will give a 90 day warning if they close wipEout HD ps3 and 2048 here https://www.playstation.com/en-gb/legal/gameservers/
edit:
a new video by playstation access
https://www.youtube.com/watch?v=FMKTsooiiNg