Gondolas and a Sky-ride are very low capacity, very susceptible to weather (wind and lightning) are incredibly unreliable, and do not have adequate climate control for a Florida. (No AC).
Orlando Eye has heat and A/C in each pod. Liquid Nitrogen A/C could also be a possibility for air conditioning (many freezer warehouses and large commercial buildings are using this method for A/C now). Cables schemes are already available that can provide electricity to air conditioning and heat. Disney doesn't need to make you freeze. they just need to keep you comfortable. Heat.. well it's only getting down to 20 degrees here at the most and a heat pump can more than handle that.
Lightning, well if that was a problem why isn't the monorail getting shut down every time it rains? Big tin can on a grounded concrete post. I can't tell you how many times I've ridden the monorail while it's storming, and the monorail is easily the highest thing in the areas it travels. It runs on electricity, uses onboard drives and is controlled electronically.
A cable gondola will be run by a centralized pulley house that can be properly isolated from the cabling system, and over engineered with surge protection to ensure it will run in the event of a direct lightning strike. Electrical at disney is a multiple loop system. There is not one cable connecting power to anything at disney, its triple and quadruple redundant for most locations which creates high reliability electricity for WDW.
Wind concerns are mitigated by using multiple cables. If this is to be a truly reliable transportation option, I can't Imagine they will choose to use less than a bi-cable setup for the marginal winds Central Florida receives during rainstorms, which is one of the transportation high demand times for the parks.
So for those dead horses, I have one more that I didn't quote, but has been beaten to death already.
Why does it need to be extremely high to provide efficiency? It's actually less efficient to make it climb high when it leaves the stations and the direction change structures. The more level the cable the less effort it will take for the motors to move the gondolas.
The old skyway cable ride at Magic Kingdom wasn't even higher than most buildings surrounding it, as well as being eye level with some trees. IMO it was a great way to get between tomorrowland and fantasyland. The cables only need to make the ride high enough to clear any obstacles beneath it. The gondola will be the low hanging equipment, not the cable.
Since the cost of building concrete pylons is so high the monorail isn't going to get expanded. That is a dream that will probably never happen. This is a bit cheaper because you build a few towers, some anchor structures, and fly a cable to each one.
I like the idea of others looking at possible future expansion of this system to Coronado Springs, DAK, Blizzard Beach, or any other place in the resort. I personally think it would be fantastic to ride into Blizzard Beach on a gondola. It would complete the effect of the park.