they look like the modern take on the original monorails--so it will feel very retro for Disneyland. WDW needs to focus more on increased-capacity monorails and they could stand to update the look to feel more 21st century.
As for the attendance levels:
1.MAGIC KINGDOM at Walt Disney World 16,640,000 3.0%
3.EPCOT at Walt Disney World 10,460,000 5.5%
4.DISNEY MGM STUDIOS at Walt Disney World 9,100,000 5.0%
5.DISNEY'S ANIMAL KINGDOM 8,910,000 8.6%
MK will always have the highest attendance and the other 3 parks have similar attendance levels--Epcot is just older and has had more time to expand. Animal Kingdom is well on its way to Epcot attendance levels--if they added a couple more rides (not even E-Tickets, just fillers to help guests pass the time) and a nighttime show, they could easily reach 10m. MGM should have Epcot's levels of attendance by now, but it is a special case in that it is a park in shambles and has been neglected so long that now guests are more likely to skip it altogether in favor of the other three parks.