Good point there headache, not to argue with your statement more like add to it.
In every business there is going to be compation. That's what makes the car companies evolve into comming up with more power, better gas millage, and different features to make driving more convenient.
The domestic car companies need this compation from Toyota like Toyota's needed it from them from the beginning. It forces the company that is lagging behind the others to improve, come out with something better for the next year. Take Honda for example with the v-tec engine they designed. here you have another fuel economy car company that was lacking in power against the domestic vehicles... now why would they wanna make a car that goes fast when there is already cars that have gobs of horse power and torque from a V8?
Should they just set back and keep making the same car over and over again for the people that want fuel economy? Or should they redesign how the combustion engine valve train is setup and maybe gain more power and keep the fuel economy and grab the attention of both sides of the crowd? That's what they did and now most every major car company uses a variable valve train system and are getting more power out of a motor that is a 1/2 to a 1/4 the size of the big v8 (and yes i know they dont produce the torque the big V8 do but that besides the point).
With Toyota comming out with the new 5.7 that Chevy has been using for years and to make the motor produce a substantially more power than the original 5.7 in the first year the truck is produced? Do you really think that Chevy is gonna set back and keep making that same engine produce the same amount of power? Or are they gonna pull their head out of their ass and try to come up with something better?
The big three need this diesel tundra to come out and dominate them like the gas tundra is doing. That way maybe/hopefully one of these companies can stumble across a new v-tec system per say, and make the diesel engine more efficient more powerful and half the size all at the same time.
