Intel® AtomTM N455 (1.66GHz/667Mhz FSB/0.5MB cache)
Genuine Windows® 7 Starter
160GB4 SATA hard drive (5400RPM
1GB DDR3 SDRAM
Up to 7 hours and 55 minutes of battery life with a 6-cell battery
It's all about the technology involved. Tablets have more advanced/expensive technology in them, not to mention the increased manufacturing costs. For example, looking at the two units you mentioned you the tablet has an expensive touch screen, more advanced hard drive, and more RAM.