- “Find your phone” – iphone 4 has a free mobileme app that allows you to locate it, lock, or wipe it from any internet connection or iOS device.
You have Wavesecure, Lookout, where's my droid etc that will do that
- Easily backup and update your os/apps/pics/videos through iTunes.
Contacts/Calandar/paid apps are backed up via Gmail. Lookout can back up the pictures (I'm not sure if they do videos as well). And I used Quick System Info to back up my apps.
- Invert colors – for easier night time viewing
Don't know about this one. I've never seen anyone mentioned this before.
- Great battery management without user killing apps manually.
- I can usually get through a day of heavy use, and always with moderate use.
The way that Android is designed, you shouldn't use a task killer unless the task is badly programmed and runs even when the phone is inactive. Battery life depends on the phone and your usage. For most people that go from iPhone to Android that I notice, you shouldn't expect the same battery life. For most people, they can go for a day (12+hrs) with moderate to heavy usage.
- Hold down home button to do voice-dialing/play list change/artist change, etc
Voice dialing yes but no to playlist change. You have widgets for that.
Stream video and music from PC iTunes to phone via wifi.
I'm not sure about this one since iTune is proprietory to Apple products.
- Super simple grocery list app like “ShopShop”
You should be able to find something on the market. Remeber the milk is a good one that a lot of people like. I have note everything that I love.
Endless customization of themes and tweaks through jailbreaking.
You can customize/theme your Android phone without the need for root. With root, I think you can do so much more than what you can do with a jailbroken iPhone.
If you do get an Android, read the beginner/intro to Android link in my signature.