Looking at myself, I see how different I work nowadays with devices than almost 30 years ago. In the early days of personal computers you spend a lot of time in figuring out what you actually can do with your Commodore C64 or your very first 286 hardware while knowing each component's specification. Nowadays it is simply about the available software. Most of the users probably do even not know about any technical details of the device they are using beside if it is slow or fast.
If you look at professionals who use computers, they often use one specific application, which maybe is shut down only once at the end of the week. Personal users probably don't know that there are more applications on the computer than the web browser.
As computer professionals we tend to forget to think about the why others do use computers. We see the full potential of the latest programming language, the computing power, the maximum available bandwidth and all the fancy features we know about.
Tablets such as the iPad or the new Nexus are great for end users. Quite intuitive to use, and no need to worry about the hardware. Whatever users want to to, they simply have to find the right app. I fact, I use my iPad for many common tasks, even for writing, blogging and editing images the apps are meanwhile quite well done.
Specialized applications used by various professionals do not need a fully equipped personal computer. Ever looked at a doctor's place? In every surgery you might find a personal computer running often just one program. Or have a look at a common electronic it furniture megastore. Each information desk will probably has one personal computer running one program on it. Often, these programs are typically host applications where the client continually requests information from a server application
There is no reason to put a fully equipped computer in every room for a single application. Either a thin client or some lightweight tablet might the answer here. Either a web hosted application or a small application communicating with a server (e.g. In the cloud) might be a good solution.
As professional software architects and designers we should consider this while designing application even if stakeholders still request old fashioned desktop applications.