In a session held by AT&T at CTIA today, the carrier previewed an upgraded version of its mobile U-verse app, and let's just put it this way: it's significantly more important to AT&T's "three-screen" strategy than the version that launched in the middle of last year. The big deal is that shows recorded on your box at home can be streamed to your phone from any WiFi hotspot, a nice little bonus for U-verse subscribers who haven't ponied up for something like a Slingbox. We don't have a launch date yet, but what we saw demoed today certainly looked like it was just about ready to go --
