IE is a new beast and i hope they stick it out for the long run
Stick it out?
A new Windows PC without a browser is a dead box, does nothing online which is where everyone wants to be, and MS is hardly going to hand over control of their OS dominance to webkit. More likely scenario would be MS opening up the kimono and attempt to destroy webkit by releasing their own browser internals.
Once they fully lose control of the browser then MS Office is the only thing holding customers to the Windows platform and Open Office is making nice inroads there as well, I'm doing my part ;)