What do you mean when you say that Toyota "finally gave up"? I don't think they ever intended the 4Runner to be a performance vehicle at all, not in the least. It has always been marketed as a vehicle at home on the street or the trails. Just one look at their 4Runner brochures should tell you that. Are you suggesting that the V8 engine option was Toyota's attempt to compete with other SUVs that are considered street machines, like the X5 or the MDX? Come on, you can't be serious!
BTW, while it is true that the Range Rover and the Cayenne have decent offroad abilities, for the most part they both suck because they come with street oriented tires. Just search YouTube for some funny videos of a Range Rover that is practically stuck on a wet field with maybe 1/2 inch of mud. Or the same type of situation where one of those vehicles is stuck in an inch or two of snow. Sure, they are capable, but the street tires they come with are made for onroad performance only. Until we see Toyota put high performance summer tires on the 4Runner, I think it is safe to say that Toyota isn't considering the 4Runner a competitor for any of the vehicles you mentioned.