You said it wouldn't "blow up". You didn't say it would replace mechanical keyboards. It wouldn't. Noone said people were going to switch from using a mechanical keyboard to that. WE are talking about its usefulness for phones/tablets. Also, a phone's on-screen keyboard replaces a mechanical keyboard in that phones dont have a mechanical keyboard and people dont use a mechanical keyboard as their input device for that phone. If my car doesn't have a mechanical key, it has been replaced by a digital key. It doesn't matter if I make 5 copies of my house key.