I'm excited that Canon is making better lenses than ever. Of course, better lenses cost more. We can have cheap or good, but not both.
Also, people seem to forget that these are introductory prices — these lenses will likely be 10-15% cheaper within a year.
Except you seem to forget that Canon has now introduced MAP. That means unless Canon says the price drops, it will not drop. Just how often does Canon announce a price drop of a piece of equipment? Hmm, well, the 5D Mark II price dropped a lot once the 5D Mark III was out and there were a couple of other 5D Mark II price drops earlier on. But I can't for the life of me recall a single price drop of a lens. Price increase, yes.
Lens prices do drop. The new 24mm/2.8 IS was $849 when introduced; it is $669 right now (with instant rebate) less than a year after introduction. The new 28mm/2.8 IS has also dropped. The 100mm/2.8L IS was $1,050 back in 2009; it is $899 right now. The 70-200mm/4L IS was $1,280 in Sept. 2011; it is $1,099 right now. Other lenses have gone up over time, like the 85mm/1.2L II and the 35mm/1.4L.
Apart from instant rebates, there is typically no announcement of a price drop. But if you make a note of lens prices, there are some noticeable drops now and then. Even before the current instant rebates, the new 24 and 28mm/2.8 IS lenses had dropped about $50 from their introductory prices. The same for other gear like camera batteries, flashes, grips, etc. The 600EX flash was introduced at $629; it dropped by $30 or $40 within a few months of introduction and is $569 with the instant rebate now. The 5DII dropped a great deal (33%) over time. The 5DIII price has dropped about $200 recently, more at some sellers.
So I feel that price drops for new gear are somewhat predictable with time, though never certain. The people who are shocked by the introductory price may not buy right away, but they may buy a year later when the price drops. Those who have an immediate need for the new item will pay the higher price and consider the premium as a "rental" cost of getting the new gear sooner.