This "we'll control the whole ecosystem by standardizing the interface!" scheme honestly sounds about as ridiculous to me as "it's a 5 billion dollar market, so if we take just 1% of it, we'll be rich!" It doesn't take a genius to understand that there are significant differences in interacting with a computer by touching a tiny screen held up to one's face, touching a larger screen held slightly farther away, pointing a mouse around and typing on a keyboard, and selecting menu items with a d-pad while looking at a screen that is several feet away.
If you deliberately try to use the same interface across each of those interfaces, you're just going to get an unusable mess. It's amazing that some of the same people that understand the idea that "you need a responsive design for your website because no one wants to hunt for 32x32 pixel buttons on a phone" can completely miss that concept when it's applied to anything that doesn't have a touch screen.
Sharing technology and development tools between the platforms makes sense. Tying the tablet and phone experiences closely together makes sense. Adopting a similar visual style across the platforms makes sense. It's still a horrible idea to say "we'll just take our smart phone app, make all the touchable buttons clickable ones, and voila, we have a full-featured desktop app!"
Desktops are inherently oriented towards small items on high resolution displays. If you make menu items too large, both reduce the amount of stuff you can fit on the screen at once and increase the travel the user has to make to select them. More importantly, desktops are inherently oriented towards multitasking, and hiding the entire screen just to open a program is inherently hostile towards that.
I'm usually the last one to complement them, but I'm consistently dumbfounded that Apple seems to be the only of the major (or even minor, if you consider the various Unix DEs) players that understands that tablets are not desktops, even when they have a keyboard plugged into them. Tablets are all about single tasking, desktops are all about multitasking, and you should not attempt to get that peanut butter in that chocolate.