There is not much different from a new laptop and a ultrabook with the basic Concepts, but when you look much deeper into the technology and features you can clearly see the difference.
Difference between ultrabooks and Laptops
An Ultrabook is a higher-end type of sub notebook defined by Intel. Ultrabooks are designed to feature reduced size and weight without compromising performance and battery life. They use low-power Intel processors with integrated graphics, and unibody chassis to fit larger batteries into smaller cases. Some models have limited external ports (e.g. USB) due to their extremely thin profile.
Image courtesy of Intel Free Press on WikiMedia
At a presentation at the Consumer Electronics Show, an Intel Manager stated that market analysis revealed that screen size motivated some of the reluctance to switch to 13″ Ultrabooks. As a result, Intel is planning to ensure, through cooperation with manufacturers, a 14 or 15-inch screen on 50% of the 75 Ultrabooks that will likely come to market in 2012
Laptops and ultra books both have their unique features and options the laptop is the more traditional pc laptop, while the ultra-book is the more modern version of the laptop.