So, tell us more about this BMW Advanced Turbo...
Amazing, from the company that once eschewed turbocharging as being the preserve of untalented engineers (I know this is beating a dead horse and I am so over it - but still -bear with me) to a company that will pro-actively use turbocharging concepts that have long been used by other manufacturers as marketing ammunition.
Make absolutely no mistake, BMW do have an uncanny knack not just for innovative engineering solutions vis-a-vis the new twin turbo layout V8 but also for improving on existing, yet imperfect, technologies to the point that they can make a fuss about it in their marketing material.
What form will this "Advanced Turbo" take? Sequential turbo's (least likely)? Twin-scroll (highly likely)? Variable Geometry (Most likely)?
We know that twin-scroll turbo's are a very effective means to delivering turbocharged grunt in a more linear fashion for a single turbo solution. We also know that Porsche, in conjunction with Borg Warner have developed variable geometry turbo technology that is now suited to the higher temperature environments of petrol engines where previously it has been used for quite some time now in diesels. The application of sequential turbocharging in petrol engines does not yield the same benefits as it does in turbodiesels and is not, in my opinion, as viable in terms of a cost vs. benefit equation.
Of course, all of the above has been done to great success before, it's just that BMW will tell us that they've done it best!

Whilst I count myself as an ardent BMW proponent, I will be the first to point out that they are consumate masters of making a big splurge about something that's been around for a while now...