There's a first test ride report
here.
About the looks, I don't really think it's a Harley copy. The bags, in fact, look a lot more like the ones on a Venture than a Harley, though all hard bags tend to look the same. That having been said, there is a resemblance to the Road King.
I think the real motive behind all the changes isn't that Harley does something. I think it's that the American cruiser market simply expects certain features and styling cues. Those things might have originally come from Harley, but now they're something that every touring bike manufacturer now includes for touring bikes in the American market. Triumph's no different from anyone else. If they want to sell touring bikes here, then they have to respond to those market driven demands.
The funny thing is, that while I like the Rocket, and came close to buying one a few months ago, I am a Harley owner right now. I belong to the HD Forums, and I can tell you, most Haley owners there don't think that the Rocket Tourer looks like a Harley at all.
Harley owners tend to be a little...provincial.
I like the new tourer, though. I liked the R3 Classic, too, and I didn't buy it only because we couldn't work out a deal I could afford with the negative equity on my bike. But, come next year at this time, I may very well be looking really closely at the R3 Tourer.