...the only way that Airbus could launch a 7e7 competitor is with generous state aid. They have the 330 already. Let it stay that way
Just as Boeing continued to make and sell 737s, 757s and 767s for some years after the entry into service of the more advanced A320, A330 and A340, so will Airbus continue to make and sell their current generation of aircraft after the 7e7 enters service, despite the advantage of technology the 7e7 will enjoy.
Until Airbus introduces a new range and siezes the lead.... until Boeing takes it again... until.....
All this, of course, unless they decide to join forces against competition from the ever-growing "regional jets", or the ex-Soviet manufacturers, or......
It's all business, and I doubt jingoistic roarings on either side will prove to be more than a distraction.