I suppose it depends on the enterprise but working in a highly regulated environment that wants to guard against data exfiltration, desktops and laptops are the exception not the rule. And once you build out infrastructure to support virtual desktops served up by low cost appliances, there's no compelling reason to go back to something like a chromebook. I have no idea what the discount would be when you buy 10,000 thin terminals but they're pretty much disposable when they break at the kind of pricing I'd guess one would enjoy.