About the yet-to-be produced thing, we have leaked pictures of GM200 showing it already in production at least a couple months back and shipping data from even further back. Plus it's on the same 28nm process node Nvidia have been using for three years now. Purported initial yield problems explaining away GK100 don't apply to GM200 at all. The chip is certainly in production with very little room for process maturation at this point to do anything.
And about whether we've lost anything, yes, we have. Remember the 980 being ~5-10% faster than the 780Ti (which is pitiful) even though there's plenty of room for the die to be larger and still be easily profitable in a similar price range? GM204 is barely any faster than GK110; it is factually the smallest increase a GPU architectural debut from Nvidia (at least anytime in the past decade) has ever yielded by a vast margin, and the chip itself is relatively puny and no doubt quite a bit cheaper to manufacture.
The GTX 680 was barely 30% faster than the 580. According to Nvidia's own representation of the 480 vs the 280 in Heaven, however (which supports that 30%), the 480 (GF100) is in the 60-70% faster than the 280 range (with tesselation, that the 280 cannot do). The 280 (GT200) had a similar lead over the 8800GTX/9800GTX. The 8800GTX (G80) was about double the 7800GTX before. The 8800GTX launched for $650 (undercut later by the massively popular 8800GT), the 280 launched at $650 (forced to $500 weeks after by ATi), the 480 launched at $500. All three of those chips were the big-die chips of their respective generations/architectures and all consistently and vastly outperformed their predecessors. The improvement the 680, also at $500, should have brought over its predecessor (the 580) is more in line with the 780 (GK110) and the improvement the 980 should be over the 780/Ti is more in line with what GM200 will bring to the table, if we're to maintain the same level of progress from architectural debut to architectural debut. Instead, we're getting rumors of a delayed Titan II for $1350 with what historically have been the 980 with a price at roughly half that $1350 to cover the extra costs of the bigger die, meaning around ~$650-700. GM204 is not a high-end chip; it doesn't perform relative to its predecessor like a new architecture's high-end chip would, it doesn't have the die size of a high-end chip, it doesn't have the physical characteristics of a high-end chip, it doesn't have the power consumption of a high-end chip, and it doesn't have the internal code name of a high-end chip, but it does have the price of a high-end chip.
Additional, look how ridiculous pricing has become. The Titan? Nvidia tried charging $3000 for their most recent dual-chip card (Titan Z), which is way beyond any dual-chip GPUs of the past even the 590 which had GPUs of a similar die size as GK110.