Yes - it does kind of feel like there are "dual environments" but having used it for a while now..I can actually see the desktop being eliminated in the future, it is no longer necessary.
If MS eliminates the desktop in Windows it will be the end of them. The casual web surfing, email only, one thing at a time user which I'm guessing you are could deal with this. Power Users, Professionals, and anyone that routinely runs multiple programs or needs to compare data between two applications is going to be put off by something like Metro.
I'm a database developer by trade, my development workstation has 3x 24" monitors... there are times when I could use a 4th. It is not uncommon for me to see RAM usage north of 10GB... as I type this I have outlook, Internet Explorer, Waterfox, a virtual machine, a remote desktop sesson, visual studio, an access database, and a copy of my current programming project all running. All three monitors are in use... If MS were to drop support for the desktop I would be forced to drop support for them because I could not do my job in that kind of environment.
I'm in the exact same boat. I have 3 x24" monitors and I often have 8+ programs running from Visual Studio, Sql Server, Filezilla, Virtual Machines, Remote Desktop, Photoshop, Outlook, Training Videos, multiple copies of Word/Excel, IM, etc. ...and as much as I'm trying to like Win8, it's a productivity killer. I tried very hard to use it for a couple of weeks, then had to go back to Win7 since my productivity fell off a cliff.
It scared me when all the "on stage" demos always showed them flipping through a picture-book and showing me how nice it was for looking at family photos, and that I "could even see the weather" on the side (inside, I went "uh-oh"). I love the fast boot and better networking, but that's not enough to endure 4 or 5 clicks to what used to be 1 or 2, and then for their apps to go full screen on my 24" monitor? (it's like going from a power user to Dora the Explorer, and yes,...that is why the 5 year old kids are 'fine' with it.)
I don't know why they are shunning people who need to be productive all day/night, and are throwing us off the bus for people who like to turn on TV, watch a movie, and look at digital picture frames. Microsoft has been so shocked at Apples sales that it's throwing its "cash-cow" user-base under the train for "new-blood" that it'll never find. Microsoft, you'll never be Apple, so stop trying, and use your strengths in the productivity world, not the picture-book world. (Apple will never be the platform of power users, yes there are a few, but that's not Apples market).