Further fueling the interest in zero-client solutions is the escalating costs of deploying and managing PCs, now estimated to be in the range of $4,000 to $6,000 per year, according to Gartner and IDC. Those same research companies estimate that a VDI (virtual desktop infrastructure) can save upwards of 70 percent over the support and maintenance costs of desktop PCs. Those are numbers that are sure to attract the attention of C-suite executives.