And that's precisely who the advertisement is targeted at - getting people on old PCs to consider switching over to an iPad.
I find tethering a lot more cumbersome than people here seem to be making it out to be. When I want connectivity on my iPad, I want it immediately, not wait that few seconds to go to the wifi settings and tether. Plus, it drains my phone's battery even more quickly.
I am a teacher using my iPad in the classroom and I have a multi-sim which uses the same data pool as my iPhone. It's just more convenient to have a dedicated 4g connection for importing files from dropbox and staying connected to the internet 24/7.
Not all touchscreen interfaces are created equal. Windows laptops sport operating systems designed with a keyboard and mouse in mind. iOS (and iOS apps) was designed from the ground up for touch and direct input. All other things equal, iOS apps will work better on a touchscreen compared to its desktop equivalent.
Convenience vs price. I chose convenience.
The primary reason I liked pages on my iPad is because it has just 20% of the features on Word for the desktop, and these are the 20% that I really only need. This means fewer redundant features cluttering up the interface, allowing me to better focus on getting work done, rather than grappling with a bloated interface.
The trick here is that "more" isn't always better, especially when "more" doesn't give people more of what they want, but instead saddles them with more confusion and complications that they need to contend with. Complexity is not the selling point here. Simplicity is.
Then they don't buy one. Plain and simple.
The ad at least gets people to re-evaluate their needs. How many people were browsing social media on their desktops long before it became prevalent on smartphones. How many people are performing tasks on a PC that doesn't really require the full processing power of a PC, and they would be better off trading the complexity of a PC for the simplicity and ease and use of an iPad?
I use the iPad to teach in the classroom and it's really an amazing device.
I would say that the iPad is superior in ways that aren’t important to you, and that’s fine – but just because you don’t value the same things as other people doesn’t make the product substandard. You should be able to look beyond your own needs and tastes. Not everyone is the same as you.