I would suggest looking at your computing habits in a slightly different way.
Your phone is a data consumption device. You surf the web, look up stuff, check email, watch video. You consume. Your laptop lets you do all this, but it also adds extra horsepower to create on it. Video editing, significant email writing, document creation, coding, image manipulation, etc. If you find yourself doing less and less creating when you're away from your desktop, then your laptop becomes less and less relevant to your data lifestyle. A BT keyboard will help mitigate the inherent disadvantages to creating on a phone, but it will only go so far. It will be difficult to edit an image on your phone (although it is possible). And if you're writing a couple pages worth of content (letter to grandma, explanatory treatise on the merits of green jello, etc.) then even with the keyboard, writing on your phone is going to be inconvenient.
But if you find that you don't write letters to grandma when you're away from your desk... then by all means, ditch the laptop and narrow your gadgets to phone & desktop. I barely use my laptop either. I'm almost entirely desktop/tablet/phone for my digital life these days.
If there is one thing a remote-controlled, silent and unseeable surveillance/killing machine needs, it’s more whimsy. -- Marcus