And going forward companies will go for iteration rather than new designs as each new design is almost a literal bet the company proposition. Just look at the 32 billion the article asserts that Boeing has already spent on the dream liner!!
There was a great article that gets posted here every now and then called something like why can't we fly any faster and it turns out the answer is that consumer's don't want to pay for it. I think something similar is happening with air craft design in the sense that we're seeing less improvement because no one, in terms of passengers, wants to pay for the cost involved to really inovate.
As to a comment about space travel/tourism eating Boeing's lunch, I think that's a pretty uniformed comment. How many private company has more space flight knowledge, patents, or design experience than Boeing?
There aren't many and I don't think there will be that many due to the costs involved. I mean Boeing has spent 32 Billion on the dream liner, what is Space X's valuation?
If I had to guess, the future of air craft design is increased partnership, not more companies.