A billion dollar valuation makes you a unicorn. What do you call a company with a trillion dollar valuation? A basilisk? A chimera? A manticore? A hippogriff? A pegasus?
None of these seem quite right. How about a kelpie? I kind of like that one.
That aside, I think Apple should run an ad similar to the one Steve Jobs ran so very long ago, welcoming IBM to the fold.
Welcome, Microsoft. Seriously.