FWIW, given how so many writing programs provide "distraction-free" writing environments, there's definitely a niche market for it. This - a digital typewriter

FWIW, given how so many writing programs provide "distraction-free" writing environments, there's definitely a niche market for it. This - a digital typewriter - is simply a natural extension of that. It's kinda like a kindle for writing - hyper optimized for one particular activity. That said, lag would be aggravating. Manageable (lag is one of the original drivers behind the VIM interaction method), but aggravating.