I am not sure other peoples setup, but my computer and keyboard are off in the corner of my pain cave. So I start up the game then jump on the bike and get riding.
But I bought a new keyboard last week and it works great for Zwift - Favi mini bluetooth keyboard $20 -http://www.amazon.com/gp/product/B003UE52ME/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1
It is the size of an iphone. So I now can easily tuck it in my jersey, then when I want to play around with the camera angles, it is a great size to use one handed and still be able to ride. You can easily hit the number keys and switch the cameras. It is fun to watch someone come up on from behind or when you pass someone, flip the camera to watch them fade away in your dust.
The battery charge has lasted all week no problem. Then you just use a micro usb to recharge it.
I just found it really handy and wanted to pass it along.