But as far as we know this is just for launch. I'd be very surprised if this process will be the same 2-3 months from now.
Man if I had a nickel....
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Hmm...perhaps 9to5Mac has more information that MR? Usually Mark Gurman's leaks are pretty accurate.
From Apple's own press release on March 9th
https://www.apple.com/pr/library/2015/03/09Apple-Watch-Available-in-Nine-Countries-on-April-24.html
Beginning April 10 in Australia, Canada, China, France, Germany, Hong Kong, Japan, the UK and the US, Apple Watch will be available for preview, try-on by appointment at Apples retail stores, and available for pre-order through the Apple Online Store (www.apple.com). On April 24, Apple Watch will be available online or by reservation in Apples retail stores and select Apple Authorized Resellers in China and Japan. Customers who purchase online or in-store from Apple will be offered Personal Setup to customize and pair Apple Watch with their iPhone.