Remember we said lots of PC makers were going to play it safe at this year's CES, introducing touchscreen versions of their existing laptops? That definitely applies to Lenovo: the company just announced four touch-enabled notebooks, and they all look pretty similar to its earlier offerings -- save for those touchscreens, of course. First up, there's the IdeaPad U310 Touch and U410 Touch, which have the same industrial design as the U310 and U410 Ultrabooks, just with a little extra heft (th
