The gondola is much worse than waiting in the sun at the bus stop because of the enclosure. It gets extremely stuffy in there, even with vents, fast, because of the enclosure and the number of people stuffed in. I know because I rode gondolas in Hong Kong, where I come from. And that's why I'm freaking out about it. Even if it's no worse than waiting in the hot sun, it is majorly horrible that instead of the powerful air conditioning, one get to "wait in the hot sun" all the way to HS and Epcot. We lost the air conditioning, and in Florida!!!!! That is the worst downgrade ever.
The travel time by bus from Pop to DHS used to be 8 minutes. I know because I timed it many times. Google map says 2.5 miles, 8 minutes. Last summer, it took longer because of a big long wait at some intersection due to construction (probably of the gondola.) Sometimes we waited 5 minutes just at one intersection. But that should be done by now. However, Disney may be redesigning the roads so that you can only go the long way now because last summer, we took a different way to HS. Even then, it was 10 minutes, same as Epcot.
The buses do not come every 20 minutes. In the morning and evenings, it comes about every 7 or fewer minutes. Otherwise, it would never be able to haul the whole crowd out of there. Furthermore, being that there is a computer board announcing the arrival of the bus, during the day people often relax in the air conditioned lobby and only go out to the bus stop when the bus is getting close. During our last summer trip, I counted 8 times when the bus was already there and we ran after it and caught it!
The gondola will also have to load scooters. If the gondola loads faster than your average gondola, than at least we don't have to wait long to get on it. In Hong Kong, the wait for the gondola is often 45 minutes, and that crowd doesn't even compare to Disney.
Conclusion: the gondola is NOT better transportation, at least not for us. It will be the new sauna style of getting to HS and EP, just like the boats that go from EP to HS. I hate those boats! I only take them in the mornings and evenings when it's not near as hot, and even then, I hate them because they are hot and stuffy and dingy, like some cheap public transportation. But, the people in the 5 deluxe resorts along the way sure don't seem to mind! My kids refuse to even ride taxis because their air conditioning is often weak compared to the buses. Therefore, I agree with you on this: Disney will have not trouble marketing the idea that the gondola is "a better transportation amenity." People will be happy to pay more to stay at Pop (and AofA and CBR) and cook themselves all the way to EPCOT while enjoying the "bird's eye view."