"With this general availability launch, users of Remote Desktop clients for Windows, macOS, iOS, iPadOS, and web will transition to Windows App."
I installed the Windows App on Windows and the first screen prompts with "Connect to your cloud resources with a work or school account. Sign in". This definitely does not make Windows App seem like a replacement for Remote Desktop, which requires no cloud account.
But it's worse than that. Anyone can create a free "Microsoft account", but you need more than that to sign in to this app. You need a "Work or school account", which is similar to a Microsoft account, but not the same thing. A "Work or school account" is an account tied to a commercial M365 subscription.
Thankfully it doesn't do this on MacOS at least. Otherwise I'd have to start reformatting my remaining Windows 10 machines with Linux (sooner than I was going to)
I installed the Windows App on Windows and the first screen prompts with "Connect to your cloud resources with a work or school account. Sign in". This definitely does not make Windows App seem like a replacement for Remote Desktop, which requires no cloud account.