What features do you think really NEED to be added to windows to make it better? You can add on from windows XP or windows Vista. It doesn't really matter since Vista has like no new features from XP aside from its new theme and the sidebar. Anyway, here's my list:
--Trash WMP! It's a horrible application! It has no built-in codecs and when you play a DVD in it, even on new machines, it chops up and has a horrible picture!
--Better photo editing software. Let's face it.....paint is so useless. It wasn't too bad in 2001 when windows XP came out, but come on Microsoft! That was almost 8 years ago! Times have changed.
--Built-in support for rar files. Not many still use zip folders. We've moved on to the better and more flexible rar format.
--Remove the start menu. It's useless. Why not just have a button on the taskbar that opens a window and allows you to see everything that's in the start menu with descriptions and more detail?
--Forget the sidebar. Microsoft, I know you tried, but no one likes it. I like it, but most don't and its bad business to make what most people hate.
--Get a decent application for editing word documents and such. Wordpad is so last decade. It doesn't even have spell checking!

:
--Put performance over visual appeal. Seriously, Vista takes up like a billion times more than it needs to. Make it look half as nice and twice as fast!
--Make a better msconfig dialog that most users can actually understand.
--Replace the shut down, stand by, and restart buttons with buttons on the keyboard. No more software crap.
--No more UAC (user account control)!!!!!!!! We don't want to be treated like criminals right out of the box! Why can't I move a file when I'm an admin without confirming everything I do????!!?!?!?!?!?!?!?!
--ONE VERSION. Seriously. Vista home basic, home premium, ultimate, business, bloatware, diliujouer, aouerenkljn, aoudrlkjhg, sdfodusroewiujg, oausdrfding, sdolrudingdskn, asfoudrldshidgsidg!!!!! Normal people don't understand that stuff! Just make it easy!
--Don't force people to enter a product key EVER! Why not just have activation? Product keys are a pain in the butt!
--IE7 sucks! Its 10 years behind the times and slow as H***! Spend more time developing your software before you sh** it out your a$$ Microsoft!
--The OS needs to take up less space on the HD. Seriously. We don't want 20gb stolen off of our hard drives when we install the OS!
--Drop outlook express. Storing email on your computer is so last decade! No one with a brain uses that. Just use gmail or another type of online email system.
--Screen zooming. Seriously, mac made a really cool zooming feature. Just make one for the PC. Everyone has a scroll on their mouse. It's a great feature!
That's all I can think of for now. What do you want in the next version of windows?