In this interview, Pastor John MacArthur predicts the coming demise of the "New Calvinism," a prediction that I concur.
Actions have consequences. The idea that a mere profession of right doctrine alone is enough is idealogical Gnosticism. If one's profession does not lead to the corresponding right actions (orthopraxy), it shows that one's profession is false and the one making the profession to be a liar. The consequences of compromise will become evident in due time, and the collapse of the movement in which one has poured out his life energy into is one highly probable consequence.
Piper's compromise of the Gospel through his association with Rick Warren is probably the most prominent action which MacArthur recounted, the inviting of Federal Vision heretic Douglas Wilson at the DG 09 conference being another of them. Piper is obviously free to ignore his critics and attack them as being unChrist-like, but ultimately it matters not what we or him thinks is "biblical," but what God actually and objectively commands in His Word. And judgment begins in the house of God (1 Peter 4:17). The fallout from these actions may not be perceivable at first, but the dishonor it brings to God, the stumbling of believers, and the possible falling away of other professing Christians will be evident in due time. Keller's denial of the plain reading of Gen. 1 and thus denial of the Creation account is another such compromise which will reap the whirlwind in due time.
The philosopher George Santayana once said that those who don't learn from history are condemned to repeat it. The episode that most parallels this resurgence of Calvinism is the Welsh revival of 1904-1905. That revival failed because of its rank revivalism and lack of a focus on the Bible and biblical truths. Likewise, if the teachings of Scripture are redefined, affirmed in the head but denied in practice, or ignored, while these people are busy attacking "watchbloggers," this recent revival will be like the 1904-1905 Welsh revival, and die out accordingly.
God WILL not bless activities that are contrary to His commands. When will men start realizing this: God is God not a vending machine to dispense "purpose," "joy," "peace," "a feeling of God's glory" etc as and when we desire them? Instead of all this triumphalism, repent and weep! Stop all the noise about being "missional," "contextualizing the Gospel," "fulfilling the Great Commission etc" while you are blaspheming God's truth all the while you play at doing church.
Woe to you who desire the day of the Lord!
Why would you have the day of the Lord?
It is darkness, and not light,
as if a man fled from a lion,
and a bear met him,
or went into the house and leaned his hand against the wall,
and a serpent bit him.
Is not the day of the Lord darkness, and not light,
and gloom with no brightness in it?
“I hate, I despise your feasts,
and I take no delight in your solemn assemblies.
Even though you offer me your burnt offerings and grain offerings,
I will not accept them;
and the peace offerings of your fattened animals,
I will not look upon them.
Take away from me the noise of your songs;
to the melody of your harps I will not listen.
But let justice roll down like waters,
and righteousness like an ever-flowing stream."
(Amos 5: 18-24)