Hi and welcome: this new forum is dedicated to Xilinx UltraScale and UltraScale+ SoC product, we are pretty exited to see the UltraScale+ MPSoC nicely booting Linux.
I can only confirm that Zynq UltraScale+ MPSoC devices are real, it is possible to design products based on them using the documents and tools available now and to get them working.
Please ask questions freely, we try to answer.