A Gartner report suggests the majority of business travelers remain unware of and uninterested in ground, air Wi-Fi: The press release for this report doesn't offer historical information, so the fact that 25 percent of US and 17 percent of UK travelers (in a sample of 2,000) said they're using Wi-Fi on the road seems quite high to me. All the numbers from the hotspot industry show usage growing at a remarkable pace over the last year.
The report summary seems to mix up answers about in-flight usage and on-the-ground use, and airport terminal versus other use. It's a little hard to figure out what questions were asked from how they wrote this up.
Essentially, they're identifying a huge additional market potential, not a dearth of growth.