I am quite new to coding so please let me live if you think my question makes no sense So I was wondering if its possible and if yes how complicated it is, to have multiple tiles on a webpage which are all scalable and can be moved and also have an app-like content. So basically a similar setup as a Desktop with open programs, but in a webpage. I hope the question is clear, otherwise let me know!! Cheers.
It is possible, but it will involve a bit of code - specifically, javascript, to achieve what you're asking. How complicated it will be depends a bit on what you want each container to contain, your skills, the amount of "other stuff" that has to be done, rescaling the content of the different containers depending on the size, etc. It can quickly be a rather complex project. In its basics, it's not that complicated, but it can quickly become complicated.
To echo @PoPSiCLe answer, yes, it is completely possible. I work for a UK company that is hundreds of miles away from my home using a web app on Firefox once we can only installed it on desktop. The problem is that the app may not be supported by all browsers. In my case, it's just working on Firefox.