RE: Where does it end?
Here is fair chase as defined on the Pope & Young website:
Fair Chase
From its beginnings, the Club has grown to epitomize fair chase and sportsmanship in hunting. This fair chase philosophy reaches to the very foundations of the hunting spirit; it remains a dominant factor in the personal hunting ethic of every responsible individual; it is key to bowhunting's future with deep roots in America's hunting heritage. Simply defined, fair chase is the ethical, sportsmanlike, and lawful pursuit of free-ranging wild game animals in a manner which does not give the hunter an improper or unfair advantage over the animal. It does, however, extend beyond the hunt itself; it is an attitude and a way of life based in a deep-seated respect for wildlife, for the environment, and for other individuals who share the bounty of this vast continent's natural resources.
The term "Fair Chase" shall not include the taking of animals under the following conditions:
Helpless in a trap, deep snow or water, or on ice.
From any power vehicle or power boat.
By "jacklighting" or shining at night.
By the use of any tranquilizers or poisons.
While inside escape-proof fenced enclosures.
By the use of any power vehicles or power boats for herding or driving animals, including use of aircraft to land alongside or to communicate with or direct a hunter on the ground.
By the use of electronic devices for attracting, locating, or pursuing game or guiding the hunter to such game, or by the use of a bow or arrow to which any electronic device is attached.
Any other condition considered by the Board of Directors as unacceptable.
SPECIAL NOTE: For the purpose of the Pope and Young Club's Records Program, a bow shall be defined as a longbow, recurve bow or compound bow that is hand-held and hand-drawn, and that has no mechanical device to enable the hunter to lock the bow at full or partial draw. Other than energy stored by the drawn bow, no device to propel the arrow will be permitted. A let-off exceeding sixty-five (65) percent, using the A.M.O. standard method of measurement, will be listed with an asterisk (*) in the Records. For further information, please click here for the "Definition of a Hunting Bow, Arrow and Broadhead"
Although we can gain advantages from new products we are by choice choosing a weapon with greater limitations. We as bow hunters are looking for more in terms of "the experience" in hunting than the killing. I believe this is shown everytime a bow is picked up instead of a rifle. I'd gladly give up some of my high tech gadgets if the option was that or hunting with a rifle. All of the gadgets you've listed can give a hunter an advantage but they can't take the place of true skill. Being 40 feet up a tree in an area without deer is no good. Neither is setting up a game can where there are no deer. A 300+ fps bow with razor tipped carbons dose no good if you're not with in range. I could go on but I'm sure you see my point.
Even with all the advancments the bow hunter is still has the smallest advantage IMO than any other type of hunter in the woods.