I'm not sure what you mean. 3.5G to LTE is a simple improvement along a one-dimensional axis - bandwidth. Maybe two metrics, if you want to account for the latency improvement. There are no such straightforward metrics for comparing Gopher and WWW. So no, that kind of thinking does not arrive at WWW being a slight improvement over Gopher.
That's not to say incremental improvements to existing features, such as LTE, can't be reason enough to sell a device (note that wasn't the question, though). As others have pointed out, though, Edge to 3G felt like a more significant step than 3G to LTE, though, just as 56k to 1 Mbit DSL felt like a more significant step than 1 MBit to 16 Mbit or 16 Mbit to 50 Mbit.
That's not to say incremental improvements to existing features, such as LTE, can't be reason enough to sell a device (note that wasn't the question, though). As others have pointed out, though, Edge to 3G felt like a more significant step than 3G to LTE, though, just as 56k to 1 Mbit DSL felt like a more significant step than 1 MBit to 16 Mbit or 16 Mbit to 50 Mbit.