Speedbird: The same reply as to your post on the BA thread. Although I suspect your question is retorical?

Changing carriers is easier. Timetables will start to be co-ordinated. Routes which would otherwise be unprofitable are feasable.

Service standards will improve across all carriers. Additional support staff are available at airports. Prices will not increase as much, as savings are made. When your plane breaks down a replacement aircraft will be available quicker. Waitlist
priority is avialable across all alliance partners etc etc etc


Nick