Ok, hold on, lets break down your list..
- 8GB RAM - WHAT?! Why in gods name will any modern phone need this much RAM. NOTHING you do on your phone now, or in the near future will need this. Small steps, lets worry about a 2GB RAM standard, then you can just to 4GB. PLEASE lets be reasonable.
- 128 GB internal hard drive with micro SD support - This (while possible) is useless to most consumers and the technology needed to make it small, light, and usable will offset the cost so high, that consumers will be pushed away.
- 1080P HD display (use screen dimensions from L1520 or L929) - Reasonable, and this is gonna be the new standard very soon. How come you have such a reasonable request for the screen and such out of this world request for other hardware specs?
- 41 MP camera from the L1020 (can be made to fit plush if phone's thickness is equal to Surface's) - *flush not PLUSH, and if you weren't aware, camera Technology is very sensitive. The sensor size is the reason you get such clear photos (especially at night). I think this is unreasonable at this time and IF it can be done, it will cost to much to make it to the mainstream market.
- Best available battery pack with wireless charging and/or removable battery option - I'm guessing you mean latest battery tech for longer battery life? Battery is a hard innovation to push, we're struggling here so what we got is pretty amazing at this point. This is an OK suggestion.
- Free Skype Service - I think Skype is free, and if you mean ability to make calls to other phones outside of Skype I can see this being a problem. That would cost MS an arm and leg to give EVERY WP user free landline calling. I can see a promotional 50 minutes a month or something though.
- Free Xbox Music Service - I can see a GIMPED Xbox music service given, something like this: Every MS ID, gets to download 50 songs for offline use at a time on a single registered Windows Phone. That's pretty appealing. (unlimited streaming and playlist creation of course).
- Full Xbox Live Marketplace - We're working on the Tech and I can see it coming in the future (included with GOLD MEMBERSHIP ONLY). I think they'll need an official controller for windows phone though (like MOGA)
- Free OneDrive Service - They wont give us unlimited as we're using a lot of MS servers. They already offer free space. Unneeded in my opinion.
- Offer on both AT&T and Verizon; contract price down to $200-300 dollars - I think $100 - $200 contract pricing, but for the specs your talking about should be around.. $450 - $550. It should be available globally off through MS Stores and Online; PENTAband, not only for me (Tmobile US) but for our people across the water and borders. EVERYONE should get Microsofts Vision.