
Ain't so bad
I've been using the preview for a couple of days and don't find it hard to stay in the desktop experience at all.
I have my regular apps pinned to the taskbar and when I need to use the (now missing) start button I click/winkey into the Metro desktop and start typing. It's the same procedure. Same time to find apps/settings.
It's the same, what's the fuss?
When I want to get a 'head's up' on the social side of my life I hit the winkey and get tiles as if I were glancing at my phone.
Works pretty well for me however the slidebar in the Metro desktop shouldn't exist, you should just drag the background. Also, poking about in the corners with a mouse if a bit fiddly.
It seems that Microsoft are make a big bet on dual purpose devices (ie a tablet you dock into a larger monitor with keyboard & mouse). Makes sense to me as I imagine iPads will go this way once Office is released on them.