It would be nice if Dawkins's approach were it in its death throes, but I seriously doubt that scientism is and there's little evidence to support that. Most mainstream scientists are naturalistic and scientistic and nothing that I know suggests a change in that any time soon.
As for Plantinga replacing Van Til, I don't think so, because their projects are not the same. Van Til is an apologist who uses and also occasionally does philosophy. Plantinga is a philosopher who also practices a mild form of apologetics sometimes. Those who follow Plantingna and do apologetics do it so mildly as scarcely to be recognized as such. Frame is, I believe, correct in his analysis of this in Cowen's
Five Views of Apologetics. Reformed epistemologists who do apologetics make the weakest sort of claim, even compared to classicalists, evidentialists, cumulative casers, etc.
Plantinga has sought to argue the warrant of faith so as to give Christianity a place at the table with all other worldviews. Van Til has argued that worldviews other than Christianity are internally inconsistent and incoherent and necessarily reduce to nonsense. Only the Christian worldview furnishes the necessary preconditions for intelligibility and thus, properly, not only deserves a place at the table but is the only one that does. This sounds, and is, audacious (and I realize that you, P.F., don't buy it), but it's not the audacity of the unbeliever rejecting God and His Word; rather it is the conviction and assurance of God's child humbly bowing before Him and His revelation, without which we cannot make sense of the world and with which we can joyfully serve our God and king.
Formally speaking, Van Til is about much more than philosophy as a discipline. He's about the theological project that sees God's revelation (general and special) as all-embracing and all-encompassing, forming the necessary foundation for all knowledge, confessing not only the soteric Lordship of Christ but also the epistemic Lordship of Christ. Typically, Plantinginians are quite wary and contemptous of all this and don't regard it as philosophy at all. Scott Oliphint's dissertation from WTS engages Plantinga's approach in light of Van Til's project. I think that it is quite good, as well as his engagement of Plantinga's attempted theodicy in
Reasons for Faith.
Here's a little something I wrote, reviewing John Stackhouse's
Humble Apologetics, which comes from the perspective of Plantinga and which , I think, quite misses the point and presents an apologetic laden with uncertainty and scepticism:
http://www.midamerica.edu/resources/journal/14/reviews.pdf. These are all the reviews from this issue. Look under Stackhouse (which mistakenly, in this pdf, follows Stewart).
One last point: I am reading Plantinga's
Where the Conflict Really Lies : Science, Religion, and Naturalism--as usual, brilliant in so many ways, and first-rate in deconstructing naturalism (or better showing how it deconstructs itself). But at what price? Total capitulation (though I realize it's not necessary, but it's what Plantinga does) to the substance of what the naturalist comes up with while rejecting naturalism. Maybe the book should be titled: What the price really is--to be thought respectable by the Academy.
Peace,
Alan