I haven't read ALL of the replies but here's my view:
When baby's awake he's eating or pooping or puking and you're changing him, getting him ready of a morning, trying to get yourself ready. He might have colic and cry a lot. Mine had reflux and would choke if I lay him down too soon after his feed so he needed lots of attention I suppose.
When they finally do sleep after a very long winding session, you need to get cleaned up, make bottles, finish getting yourself ready, sterilise stuff, pack his bag if you're going out anywhere, etc.
You will have nappies, wipes, empty bottles, bibs, changes of clothes, maybe a bath etc scattered about, so lots of mess to be cleaning.
I had PND so the mere thought of getting us both ready seemed like running a marathon.
You have to think about every tiny little detail before you go out. Say you stop at the shop to get a paper, you can't just leave your new little baby in the car alone, you have to take him with you. In and out the car, once a 2 second job, is now a 5 minute faff of baby seat belts.
You will be up a million times a night and you will be very, very tired, so everything will seem to hard and too emotional for you to do. You will want to grab 5 minutes to yourself but might not get it. Then there's the usual cooking of meals etc. A shopping trip with crying and faffing takes forever.
You get the jist anyway.