As you may have not noticed lately
For a number of reasons, a lot of corporate office space is built around the idea of everyone having a laptop, even if that laptop does not ever go outside the office. There are many advantages of building a fleet of laptops vs. dropping dumb terminals across the office. Among them:
1- Laptops can be moved to meeting rooms, cafeteria, office lobby and other spaces where no one would have ever though that people would like to work. That is an additional plus of flexibility. The usual alternative to laptops is dumb terminals, which require a network port, keyboard, monitor and mouse anyway. Replace the dumb terminal with a docking station and you have a seat that can be used by anyone with his own laptop, even someone from outside the company.
2- These dumb terminals get quite expensive when you add up the cost of the massive server farms and bandwith necessary to support the 9:00 AM login rush. And your mobile workforce needs laptops anyway, so you're going to incur the expense of building the corporate image and deploying the standard tools on these machines anyway.
3- Offices are no longer able to host the full headcount, it is assumed that there is always a percentage of the people that for a number of reasons (company policy of "two days a week", sick leaves, people travelling) work from somewhere else. Depending on the location (London?), square meter of office space is costly enough to make this later point a significant saving.
In the end, corporate sees that, except for harsh environments or high end engineering machines, it makes sense and is cheaper on the long run to build a laptopt for everyone. Even if half of them will never step outside HQ.
Hence laptop manufacturers used to corporate accounts are quite right in seeing mostly laptops in the offices, even if they don't see them much outside. Agree that from the outside it seems absurd to promote laptops as a good fit for "remote working" when they were supposedly created with that use in mind, but this is where things are today.