This is because on Apple’s website, they have created a link which when viewed using a mobile phone, will allow you to see what the new iPad Pro looks like sitting on your desk. Note that you will need to use an iPhone or an iPad to view the augmented reality link, since it will require the use of the rear-facing cameras to help judge the size and scale of the tablet.
In a way it’s kind of coincidental that Apple is using augmented reality to help market the new tablet. This is because, for those who missed the tablet’s announcement, the new iPad Pro models come with a new LiDAR scanner which is said to help improve on the accuracy of augmented reality technology.
There have also been rumors suggesting that Apple could actually be introducing similar tech to the 2020 iPhone, and this only seems to fuel those rumors.