iCan't believe this hadn't already been mentioned in the iDebate...
Are they called iMacBook Air, iMacBook Pro...? The last 'i' laptop was iBook, which was discontinued in 2006. And 'i' appears just twice in Mac mini (of course, Apple's spell check will correct any attempt to capitalize the m in mini).
And while there has been an iMac Pro, iMagine the uproar among Mac Pro users if their beloved towers were i-appended. The 'nays' would have it.
About the only time i use 'i' and 'Watch' in the same sentence is, "I watch TV" (and even "I watch Apple TV+"), but I really don't care what someone calls their personal stuff as long as other people understand them. I bet even iAppleCare would provide support (I don't think it voids the warranty). A Rose Gold Apple Watch by any other name is still best-identified by its serial number.
As a sometimes-editor I certainly would correct "iWatch" in a piece destined for publication. Unless, of course, it was part of a statement enclosed in quotation marks. In the case of such a quotation I'd be duty-bound to include "(sic)" immediately afterwards.
Lighten up, people. I don't know how many times I've used "Watch" (sans "Apple") in MR discussions about Apple Watch, yet nobody has complained. The basic expectation when people use pronouns, nicknames, etc. is that there be adequate context. Around here we know "Steve" means Steve Jobs, and "Woz" means Steve Wozniak.
I'm going to invoke the "Miracle on 34th Street Defense" (
https://www.moviequotes.com/quote/fred-gailey-your-honor-every-one-of-these-lett/). If you Google "iWatch," you'll get lots and lots of links about Apple Watch. If an authority as august as Google recognizes iWatch as an Apple product... I rest my case!