Tell you what, Ray
here's what you need to do:
1. use a decent screen resolution, worthy of the second octile of the 20th century. Not x768, not x1080. We don't all want wide screen TVs, some of us want a computer.
2. Either a minimum of 4 USB ports (all USB3, of course) or ship with a wireless mouse so we don't lose a USB all the time to a plug-in for a mouse. You could offer an optional wireless optical drive too, while you are at it. And 4 USB anyway.
3. Bluetooth. And Let us bung a SIM card in for connectivity if we want, too. My Dell mini-10 cost less than £200 and has bluetooth, sim slot, camera and microphone all built in. You could throw in a bluetooth earpiece too, that parks inside the case or wall-wart for storage and charging.
4. Use bog-standard memory and hard disk interfaces so we can upgrade when we want. It's our sodding computer. It doesn't have to be as thin as a sheet of cardboard. If it is, it will probably break. Oh, and a plug-in battery so I can change/upgrade it later when its knackered and the 'puter isn't.
5. SD card slot. Full-depth. So I can leave a card in all the time if I want. Better yet, two of them.
6. Firewire. Thunderbolt. HDMI. VGA adaptor cable in the box or as an option. Ethernet, or adaptor cable in the box.
7. Touchpad with buttons, not the-corners-are-the-buttons. Adjustable sensitivity for 'tapping', including OFF. (as in FRO?)
8. One of those wall-warts with plug adaptors based on a figure-8 mains adaptor, so we can swap them or use a longer cable if we want. Oh, and stick 1 or 2 USB headers on the wall-wart so I can also use it to charge some other stuff from the one socket in the hotel room.
9. Touch screen if you must but not as an excuse for charging a thousand quid. Meh.
10. As others have said, A CHOICE OF SODDING OPERATING SYSTEMS. Not one rammed down our throats like a randy Geordie lasses tongue on a saturday night, all fags and curry, leaving a nasty aftertaste.