The larger tablets have been too big for me. I waited until the 7/8 inch ones came out. I played with a Google Nexus 7 for a while but decided for my use cases the iPad Mini would be more suitable. Using your wish-list...
1) Tomtom app for iPad - Doesn't need a network connection.
2) Open Streetmap clients are out there. An update tool is just software.
3) Why the hell do you want a full size USB. They're *HUGE*. The iPad Mini is only about 5 mm thick in total. It has lightning which is a USB host. I would like Apple to support more devices on it. SD card and USB storage devices have limited support.
4) I love the thumb keyboard you get by 'splitting' the keyboard. On the Mini it works really well with everything easily accessible. I would imaging its a bit big on a full sized iPad. I have a bluetooth apple keyboard for various uses and with the iPad it works really well. Its a bit bigger than you want to carry around normally but quite light. (http://www.cyberspice.org.uk/blog/2012/12/29/apple-bluetooth-keyboard-and-ipad/)
5) Since I live in Northern Europe. I've not really had a chance to use it outside in daylight :-D
6) "Hardware" toggles aren't really physical switches in the connection. They're still just switches that toggle GPIOs. Easily over-ridden in software if you want to. Having the slide switch on the iPad more configurable would be nice.
7) HDMI connector? Wires, how retro! Again the lightning connector supports this functionality via an adapter. Like the USB connector an HDMI connector is quite large and not everyone will want one. The current use of adapters on both IOS and Android tablets is a better solution. However I use Airplay via an AppleTV to watch movies and play games on my TV. Works nicely with Netflix, iTunes, and BBC iPlayer.
8) Stereo record is another function that not everyone needs so why build it in if you don't need it. Android tablets with a USB host should be able to support it via a dongle.
9) The bright LED is something missing from the iPad Mini. The iPhone has it but not the iPad Mini.
10) To be honest I'm not worried about supporting multiple OSes. If I wanted that I would have a laptop (which I do). The iPad is something I can carry in my handbag and pull out when I need a web browser, e-mail, to SSH in to something or what ever...
A lot of the wish list is possible now with at least one of the available tablet types. The requirement for things like full sized sockets and the like kind of defeats the whole purpose of the small, light, thin, tablet and is missing the point.