When will I be able to buy a 7/8" tablet, with USB2/3, and (micro)HDMI-out, with a 2.0Ghz quad-core, 4GB of RAM, and at least 64GB (preferably 128GB) of fast flash storage, that can function as both a tablet, and a desktop (when "docked" with charging, USB, and HDMI cables). Oh, and it should cost under $120.
Sounds like you're demanding too much for 1 device when maybe 2 devices will be more suitable / flexible (ie, a desktop / laptop + 7" tablet) and simply syncing the two?
"Buy cheap, buy twice". Even at $200, an i5 that lasts 5 years = $40 per year which is less than the sales tax / VAT alone you have to be losing buying something new but inappropriate every 3 months (let alone money lost on the devices themselves).
Take a clean sheet of paper and start from scratch:-
- What do you actually NEED - and for what purpose? (as opposed to looking at hardware and imaging what it "could" do)
- Does every need have to be mobile?
- How often will you carry it around with you? Constantly like a phone or only occasionally?
- What tablet OS's
FEEL best to you - Windows, Apple or Android?
- What applications will you run?
- How much space will you really save plugging a monitor + USB keyboard + USB mouse + powered USB hub into a tablet vs simply buying a Mini-ITX rig?
- What
kind of "space" are you trying to save? Something *on* a desk (plus a USB hub next to it) actually takes up more
usable space than a larger Micro-ATX tower *under* the desk.
- Have you already tried to use / test half the applications in actual practise on a 7" screen for a reasonable length of time, ie try and do 2-3hrs continuous work and not just "play" with mobile office for 10mins? Most people I know who originally wanted a 7" tablet for "mobile office" to replace their "bulky 15" laptop" ended up buying a proper ultra-portable 11-13" laptop with desktop Office due to the 7" screen size, lack of proper mobile keyboard & reduced mobile Office features not being good enough for even simple things like accurately selecting multiple sections of text in Word (which is about 8x quicker on a mouse than a stubby finger on a small high-PPI screen).
Don't bother chasing "the last watt" of power as you can easily build a sub-25w idle / sub-75w load full blown i5 desktop with the right components and a little bit of tweaking (still leaving it at 3.4GHz stock). Everything really does boil down to how many sacrifices will you make trying to turn a 7" tablet into a desktop.
Tablets are still overwhelming *consumption* based devices - not production based devices. And much of that isn't tech specs (CPU, memory size, etc), but overall ergonomics (tiny screen, no integral keyboard, etc). Think about how that affects your needs, and don't just "believe" that you can replace a desktop with a tablet based on theoretical "
well x app claims to do that just as well" until you've actually tried doing it yourself in practise.