They have an assload of cash on hand and the singularity is coming at us like a freight train. I'd think they were drunk if they weren't snatching up everything relevant in sight.
I wonder if they managed to pay for DeepMind out of funds that are "stuck" offshore (i.e. earnings from outside the US that can't be repatriated without incurring a big tax bill).
Companies with excess cash are supposed to pay dividends and/or buy back stock.