Is this somehow satire? This is just the dgx spark with keyboard and monitor in a convenient format. Since it has more stuff, I'm sure that the price mark up will increase too.

Up to $5000 because why not?

With that money you can build a real PC with rtx 5090!

Not with 128GB (less OS) available to the GPU you can't. The unified memory is the point with this machine (and the dgx spark).