Like you said, you still need look at the screen to see if you're typing in correctly. I am not sure if you read my original comment, but this is one thing I learned while experimenting that's obvious in hindsight. On your computer, you can type completely without looking at your keyboard because you are looking at the monitor/screen which is a separate device from the keyboard. On a mobile device, they are a single screen. Which means you still have to look at the screen portion of the "screen" even when you don't need to look at the "keyboard" portion. Which is why it doesn't make any groundbreaking improvements even if implemented. At best it's just some minor add-on convenience. Your steam controllers example is exactly the same as computer keyboards because you're looking at a large screen (which is again a separate device from your gamepad) when you're playing games.