I voted for the I'm a troll so I'll go here and my answer is:
no 360 sucks it will never sell that much nya nya nya nya nya nya...ha ha ha ha ha ha
but in all seriousness here yes it will sell 70 mil if its around another 5 years. 360 will probably sell a consistent 8-11 million for the next several years. its strange though in an era where console prices were so high and the economy is so bad we're seeing strong sales from every console. i guess we all love our expensive toys the most