Both zoom and sensor size are at their physical limits within these cameras and won't be progressing in 2 years or 10 years. Most manufacturers are switching over to CMOS based cameras so I think the current and continuing trend will focus on the benefits of these sensors, such as the ability to shoot Full HD video. However, these sensors offer inferior still IQ so the gains are going to come at a cost.
Like LTZ470, I have both the ZS7 and S95 and think they are the top 2 cameras (for different reasons) right now within their class. I consider the LX5 to be in a slightly different class due to its size (somewhere between the S95 and G12).
Disclaimer: I take photos of life rather than live to take photos and my opinions of cameras are reflected accordingly.