For me, the question is whether LP can be switched in the way that Ethernet and IB can be.
I look at LP and think about Infiniband not Ethernet. IB’s management protocols and ‘subnet’ control are very very good things that make IB better than GiG-E or 10-gig-E.
But IB is relatively expensive. LP being targetted at consumer market should make LP less expensive than IB.
If LP matches IB’s management and control capabilities then I think LP could be a winner in the cluster market, a real alternative to IB.
So far it seems to me LP is targetted at peripheral interconnect – I’ve not seen a networking protocol stack… I may have missed finding it though.