First of all make sure that you re-install the boot loader. Although it might have been restored ( as u used dd image ) but installing it once again will not create any harm.
Secondly if there is major change in hardware ( as compare to old system ) of the new box you might need to config some things which will be detected on boot time by kudzu.
Actual faliure can only be faced when you really boot the system on new hw. Don't worry loads of people here to help you out.