I'd love to do both but I have an old laptop and it would require getting 365 and using a cloud, which isn't a bad idea. It just takes the time to figure out if I need a new laptop or just a system upgrade. I do use my handheld device for tweeting, FB and such. I still need to figure out how to use the laptop away from my desktop that is my main station.
I mostly use the desktop computer. I like sitting at the computer in a chair and work. Rarely laptop when desktop gives a problem. I, sometimes, use my mobile phone also for viewing youtube or commenting on articles.
I just have an old Packard Bell laptop (that I've used to write seven 690pp MSS and over 350 Hub Pages). It's past its sell-by date, still on Windows Basic but works all the same. Got the dosh, though, to buy a replacement when I get a round tuit (still as rare as hens' teeth). Meanwhile this does the job (the only tablets I've got anything to do with are on prescription, and I don't wear combinations).
I also used to do that way 2 years ago. But, I write very very slowly holding my right hand with the support of left as my thumb and pointer have become weak many many years ago. So, I feel typing straight easier as it does not require the hold.
Lying in bed with an early morning cup of tea,catching the news and replying to this question on my iPad (Love it!) Later I will be tapping mon my slowly dying windows 7 laptop (hopefully to be replaced with an Apple Mac when my ship comes in).
I use a desktop everyday. It is in a office / study environment overlooking a garden seen through the window in front of the desk. I have an older laptop that pokes along like a snail on the internet, so do not use it.