Reading the original source article [1], I think he's enthusiastic enough. He also comes across as being more conservative than many at the pace that it's going to be picked up and realistic about how limited the tech is currently.

Per your quote, he apparently also is open to the possibility that VR could turn out to be a dead end but that's not so much a lack of enthusiasm as not being a mindless cheerleader.

[1] http://www.polygon.com/features/2017/2/15/14616192/gabe-newe...