Slide It!

The basic idea behind Slide It is that you specify a word by sliding your stylus through the letters in the word, without lifting it up for each character.

According to the voice over, you only have to draw a rough trajectory, plus once you've drawn the first few letters, the system uses a predictive algorithm to list possible words.

According to their website, they received a patent for the technology in April 2007 ... I wonder why I've not heard about it until now, and why it's now in the news?