This title is not accurate. You could always sell your code and assets but you would have to recompile and resubmit whereas now it stays live through the transfer.
Depends on what you consider to be the "app". The procedure you describe means the app gets a new name, a new bundle ID, means that no existing purchasers get a copy of the newly submitted app, no automatic upgrades, user settings are not migrated, no reviews transfer over, etc.