Just to be clear, I wouldn't get this card just because it's Apple. I'm far from being a fanboy and would rather be able to remove myself from their ecosystem come the time as seamlessly as possible. Also I think titanium physical card is showy and naff.
But, if the rates they're offering in the US are reflected in the UK then it would certainly become my primary card. Simply because it would treble my annual cashback rewards. If not, then I may still get it assuming there will be at least some cashback on offer, and because the statements look a lot nicer and clearer. I won't be throwing a showy-off titanium card down on the table when splitting the bill though.