I practiced this on a 60% after that one james bond movie where the villian touch-typed with one hand haha
He is also very good at swapping keyboards quickly, especially between closeups and other shots. 
I'm glad I'm not the only one to notice this
Boris is quite the Geekhacker. Lots of Model Ms in that movie... curious about some of the other ones.
The reason he can type so quickly with one hand (while looking at the screen) is of course because it's a movie, and he seems to only needs the keys in one cluster of the keyboard.
That being that, I've recently been practicing typing with just one hand on a standard layout keyboard. I'm at about 40-60 WPM, depending on the complexity. These are my tips:
1. Yes, it's doable! It needs practice, but once you start to get the hang of it, it can become quite fun.
2. Pick your best hand (normally the hand you write with). For me, this is my right hand. You will need as much control as possible.
3. Angle the keyboard towards that hand. I have mine rotated about 30-40 degrees towards the right. This allows my forearm to move my hand parallel to the keyboard, so when you move your hand, your fingers are more or less on the same row. This will also drastically reduce wrist fatigue and risk of injury.
4. Start on an easier keyboard. Reds and Browns were both very difficult to me at first. I found my Apply aluminum keyboard to be easiest at first, then moved on to MX Blue and buckling springs.
5. Use all of your fingers; you need to take advantage of all them, allowing you to quickly use punctuation. My hand tends to move around the board, but it's always good to try to use the closest or most available finger for the task, rather than just using one or two fingers for everything. Also, having keycap markings are essentially a must.
6. Take your time to learn. Typing properly is more important than typing quickly when it comes to practicing one handed typing. Make sure to press each key as dead-on as you can.
7. I find it easier to bottom out the keys intentionally. Depending on the switch type you're using, it can be difficult to tell for certain if you've registered a key or accidentally registered an adjacent key, and with one hand you aren't as able to see what's on the screen while you type.
8. Practice on a regular basis. For me, once I crossed a threshold, it became easier, and I improved at a faster rate.
I hope this helps someone. It can be fun to do, and you might look like Boris.
And yes, I typed this post out with one hand on my Blackwidow (MX Blue).
