Tablets had been done before without success, then Apple released the iPad. You don't have to be first to market to win. The failure of others in the same segment is not a predictor of future failure.
Execution is everything.
I was already doing this in 2013 with a Nexus 5. I had a wireless mouse, wireless keyboard, wireless display connection, wireless charging, and Linux for Android running Ubuntu. It was terrible, because all the wireless things created lag, it was like screen sharing on a bad connection with someone in Asia. I bought a slimport cable and it was still terrible. USB 2.0 simply didn't have the bandwidth to push FHD display resolution without artifacts.
I see USB-C in the bottom of that stand. If that's USB-C 3.1 gen2 then it has 10GBps and enough bandwidth to push 4K at a decent refresh rate. I see the potential to have a wired keyboard and mouse using the monitor as a USB hub. This is already a much better solution than has been offered before by other companies.