Dev costs likely won't change much. Not as big of a drastic change and all three have similar enough architecture that multi-platform development should be far easier... including with PC.
WiiU will be fine but obviously not Wii sales. We're not breaking 100m here.
Xbone will be profitable for MS even if it won't sell as much as X360.
Sony will be big winner here as with MS selling less, Sony will increase its sales over PS3.
That's my early gut feelings this gen and I guess we'll see how it turns out.







