Over at Pocket Lint there is an interesting interview with Greg Sullivan, the Senior Product manager for Windows Phone detailing why Microsoft has decided to continue down the route of an entirely separate operating system for phones rather than using Windows RT.
Sullivan states that he believes that the phone is "unique enough to devote a specific effort... and differentiating that", going on to make comparisons to the most successful tablet on the market at this time:
"When I use an iPad I think it’s a really pleasurable experience, it’s a great consumption device, but I constantly run into guardrails. I want to connect a USB mass storage, oh I can't. I want to print to a printer other than the one Lexmark or whatever, I can't. I keep wanting to do things I can't do. I think it's primarily because of the fundamental strategy where they [Apple] took a phone OS and stretched it up to a tablet."
"We are taking a PC OS and shrinking it down. We could have done the same thing, but it doesn't make sense. When we deliver Surface or any Windows 8 device, the Pro model will run every Windows app ever written. That think will run Visicalc 1.0 from 1981. I saw a demo. It's amazing. It's part of the promise."
"They draw the line between the phone/tablet and the PC, and we are drawing the line between the PC/tablet and the phone."
Let's back up a little bit, and remember the differences between Windows 8 and Windows RT. Windows 8 is your full-fat, all inclusive, no compromise operating system which runs on the traditional x86 infrastructure. This means it can be installed on your existing or new systems built on an Intel or AMD processor (or something more exotic using the same instruction set)...