The hunt to find the piano with a perfect touch would be a very tough assignment. On a 10 point checklist of qualities required for consideration, very few pianos would achieve 10 out of 10.
Though wonderful specimens of the piano maker's art, even expensive new pianos, are often short on the magic that sparkles when the action and keys supply the player with the wings of creative inspiration - allowing flight to that mysterious zone where, the player is released from the confines of unsatisfactory playability, and enjoys the timeless pleasure of music making purity. This zone is home to the perfect touch. Playability fulfilled!
A tuner/technician's experience will agree that perfection in a piano is almost unheard of! My old boss, when I was an apprentice, often used to say, "Pianos are imperfect instruments!" - of course, back in the 1970s, he was right - the pianos of the time were generally very poor and always, had issues. I think he got tired of having to find new things to say to customers who rightly felt disappointed with their purchases.
Surely today, pianos must be somewhat closer to the ideals of the piano designer's blueprint! Throwing money at the problem is not always a complete solution - indeed, unless the those undertaking the challenge of sorting it out, know exactly what they are doing, the finished piano might still only be an expensive disappointment.
We, in the trade must strive for excellence and then, go the extra mile, make an art of the job, sprinkle with gold dust and unlock the wonders of a well regulated action and give the 'Perfect Touch' within, the chance to inspire further generations of keen pianists!