It can be good for Xara but not exactly the way the OP described. Professionals will not exchange Adobe Creative Suite for Xara anytime soon. They are not comparable for professional use.
And this is in fact beneficial for professionals for the reasons Gary stated.
What this new Adobe deal left out is those non-professional users that were using the software as a hobby and power-users (not professionals) that canīt justify the price of a subscription and may be now searching for alternatives assuming that no one will crack the new Adobe CC versions. Otherwise everything will stay exactly the same.
Unfortunately Adobe announced it will be killing Fireworks. A real pity. It's a really useful and intuitive program.