If somebody were doing a browser-based game there is absolutely a place for this. Sure, general apps should not do this, but I wouldn't say you should never do this.
That said, the performance on this is too poor to use as is.
That said, the performance on this is too poor to use as is.
Really? I found it to be super responsive (Firefox on Linux).
But yeah, i agree, for things like games this would be really cool.