Too higher TDP - and as such I Honestly don't see the point at this point in time. If the ~30% > silvermont IPC is true, then it's an instant failure IMO. There's a reason why Intel are delegating it to cheap 'cloud books' and whatnot.
If they'd achieved this sort of performance boost, and remained in the 2.5wSDP/4wTDP bracket, It'd be a different story. It seems instead they've upped IPC @ similar clocks, but at the expense of Power - which is fine for netbooks / cloud books - at least they won't be so under powered now, but not exactly exciting.
Will reserve judgment until someone actually tests these things though , might be surprised.