An iPad has several advantages over a laptop, including its touch screen and portability. But depending on what you want to do, it might not be enough.
Apple's Notify Me feature can update you every time a price drops or a product comes back in stock. Tell it what to do and it'll take care of the rest.
Your MacBook's storage is vitally important. If your SSD or hard drive goes kaput without a backup, getting your files back can sometimes be impossible.