I guess its great if you're buying the camera for video. For still photography it gives no advantage. I've only recorded about 30 minutes of video in the past 2 years. I haven't even touched my video camera in a long time.
Using an effective live view on the Sony A55 -- once live view is a true option, I use it at least as often as I use the EVF. There are times I don't want to hold the camera at eye level, and I don't want to crouch down.
Or tonight for example, taking fireworks shots on a tripod.... Composing the shot on the LCD was much easier than using the EVF.