Lenovo is known for all-in-one PCs that stand out, and that's certainly true of a new four-model update to the company's IdeaCentre line. The headlining B750 is reportedly the first PC to include a 29-inch, 21:9 aspect ratio display; its 2,560 x 1,080 panel is potentially ideal for both movie aficionados and multitaskers. Lenovo appropriately equips the B750 with a 2.1-channel JBL audio system