The NY Times obituary says that Soleri "showed a generation of younger architects an alternative to corporate modernism."
The LA Times describes the Italian born architect as still influencing recent projects:
Lately some hugely ambitious developments have echoed Soleri's call for an architecture that huddles densely in the desert, sharing resources, rather than spreading thinly across a vast area. One of them is the $22-billion Masdar City project on the outskirts of Abu Dhabi, designed by architect Norman Foster as a hyper-efficient "cleantech cluster."Daily Dose of Architecture has a touching obituary.
Here are some photos I took of Arcosanti a few years ago.