My colleague Kevin Tofel posted this great piece this morning questioning whether 4G networks will change the mobile Web. After all, when mobile network speeds approach or exceed fixed-line speeds, will there really be any need for dedicated mobile sites? I think the answer is yes, for two reasons: firstly, mobile devices still take longer to load content than PCs do, so a stripped-down site is often better for on-the-go usage. But while that technological hurdle will be overcome in time, there[s also the question of use cases: most of us are looking for different stuff when we use the mobile Web. So for most companies, a dedicated mobile site that takes into account those differences will always be necessary.