<A target="_blank" href="http://www.pcworld.com/article/241568/acers_s3_ultrabook_cracks_1000_barrier.html#tk.rss_news">The S3 weighs less than 3 pounds, has a 13-inch screen, and runs an Intel Core i5 processor</A>. The big difference is the price, US $899, slightly less than either Toshiba's or Lenovo's new ultrabooks.