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.
Watch at 3rd party retailers. But still, trying on a few bands would be something I'd do when shopping for a new watch. £350 for a watch is still a very expensive watch in my eyes. For many that's nearly two weeks wages. I understand Apple Stores are crowded enough as it is, but surely there is a better way than this.