It says you will lose them because you're wiping the iPad. Don't worry - as Stephen said all purchases are linked to your account.
Just make sure that you do a full "
Erase all Content and Settings"
after you have backed up the iPad. This is a secure wipe, so it'll be safe to then sell/give to someone else.
You can also back up to iCloud as well as iTunes, and use that to restore everything onto the iPad 4 instead of iTunes. I don't actually use iTunes for synching or backing up anymore.
---------- Post added at 11:52 ---------- Previous post was at 11:34 ----------
Oh, and for anyone who received a nice new iPad for Christmas and wants to play "iTunes unfriendly" videos (xvid, wmv, mkv, etc.) on it, try this:
AVPlayerHD
Both it and the iPhone version (
AVPlayer) are excellent. They were pulled from the App Store a while back, but were recently reinstated.
Other apps I'd recommend:
If you use Twitter, get Tweetbot. It's far superior to the official app.
iPlayer, Sky Go, 4oD, ITV Player, and Demand Five all have apps.
The Sky+ app is great if you have a Sky box with the new EPG. Guide + Planner management + remote control.
Or if you have Virgin Media TV, get Virgin TV Anywhere.
TVCatchup lets you watch live Freeview.
SmartGlass is good for those with an Xbox 360.
Some games, in no particular order... Sky Gamblers: Air Supremacy and Sky Gamblers: Storm Raiders, ARC Squadron, Asphalt 7, Galaxy on Fire 2 HD, Infinity Blade 2, Jetpack Joyride (currently free), LostWinds 1 & 2, Modern Combat 3, Modern Combat 4, N.O.V.A. 3, Superbrothers: Sword and Sworcery EP, Temple Run, Need For Speed: Most Wanted (currently only 69p), Grand Theft Auto: Vice City...
There's an app for Brian Cox's Wonders of the Universe.
BBC News, YouTube.
Comics? comiXology Comics, Marvel, DC.