agile companies and DaaS?
Just spoke with a CISO of a mid-sized (2000+ people) of a newer company. How they got so big so fast (within past few years) is by being nimble. They pursue contracts and grow/shrink based upon the business opportunities they have. This business, in a heavily regulated financial services industry, is using the "movie-production" paradigm and is increasingly successful because of it.
The concept of on-prem VDI is not long for this world, I don't think. The fact we are going back to zero-clients and centralized computing is not like going back to mainframe days. Why? Because today's mainframe is the cloud and the cloud is increasingly being offered by "utilities" such as Amazon. While some might say that utilities are no great shakes in providing customer service, my take is that technology has allowed centralized models to be incredibly responsive and customer service-oriented.
So, traditional PCs, on-prem VDI or DaaS? Given the rapid evolution of end-devices (tablets, smartphones), the emergence of open-source SW (LibreOffice, OpenOffice, gmail, etc.), and the cloud, DaaS is the best way to take advantage of multiple choices, dynamically and "as needed."