EITHER flat touchscreen devices are inherently unusable OR designers don't have to make major compromises to provide accessibility. One or the other — not both. This article spends half its time bashing touchscreens and the other half brushing aside designers' objections that they'll have to make sacrifices to achieve the kind of accessibility he's looking for. Not even arguing against the objections, just saying that it's not really a problem and the real issue is those darn lazy designers who "don’t prioritise the effort."

It would have been really cool and useful and might have actually changed some minds if he'd included practical advice into his post rather than just gripes and platitudes. Brushing aside the objections of the people you're trying to convince is pretty much the worst argumentation tactic imaginable.