They said so.
"Improved" means more of the same.
They *didn't* say "new touchscreen tech", now, did they?
Marketting-speak tells you a lot by what they don't say directly.
If they were using something fancy, say infrared senors, they'd be bragging all over about the advanced Sony tech. Maybe give it a funky marketting name.
They're not.
Odds are its a thinner, better-bonded resistive layer.
Still an overlay, though, and its still going to diffract some.
Hopefully it won't be noticeable.
(Hopefully because if these readers tank there'll be one less player by next year, not because I intend to buy them.
)