Screen mirroring on Android is still a bit of a hit-and-miss prospect. Plenty of issues can arise from environmental factors like network congestion, to the type of device being used (*ahem*, Tegra). A few months ago, we covered a recent entrant in this market, BBQScreen by XpLodWilD and nebkat. The app was able to deliver a pretty consistent 25 fps from several types of devices over WiFi, Bluetooth, or USB. Unfortunately, several bugs and incompatibilities plagued some users, but the developers have been working hard to remedy many of those issues.
Somebody over at Sony Ericsson headquarters must have had a tad too much beer last night - the company has just announced one of its best products yet: the LiveView, which is essentially a Bluetooth remote control for your Android device. The catch? It requires Android 2.0 or above, which is something SE's own Xperia X10 family of phones don't currently have.
Regardless, the square little OLED-packing device does look pretty nice, with functionality that is said to make it a "micro display that mirrors the phone," although it is not yet clear how a 4.3 or even 5-inch 800x480 display will be mirrored on a tiny 1.3" device with a physical resolution of 128x128.