If proven in performance, I plan to start with Mac mini. I'd like to test how Arm Mac ecosystem will work out with least amount of money paid.
Even if Arm Mac's performance is more than 16" MBP, I will probably pass the first gen until all those awkward software changes is somewhat ironed out after a year.
Eventually, if Apple silicon, of same generation to whatever intel and nVidias are offering, is performing better, I plan to add a high performing Arm desktop. But we will have to see about this.
as you can see, it's all about the performance for me. Regardless of all the marketing hype from Apple, the transition will not be 100% smooth, and I should have a real compelling reason to switch to Arm.
Oh one more thing. If Apple introduces a whole new product, such as a Mac Pad, I'd be sold.