I beg to differ,
It'ts not the tablet form factor that is the problem. It's the OS and envitornment that limit yourself. You cannot develop for IOS on the ipad or iphone, you cannot easily develop for android in an android device. Those environment are pretty limited, because they are mean to work as appliances, not computers, however, the underlying hardware is a computer, and quite powerfull for what is worth.
You really don't need several gigaherz of processing power but for a couple of task, gaming and hardocore calculations, that you won't be making in a tablet, however it doesn't mean that the tablet is worthless. It has other uses, and touch interfaces are sometimes far more efficient than using a command line (Yeah, label me and heretic, burn me for my blasphemy!) This is about freedom, having new tools, trying new ways, I'm a proud linuxer and I can tell you, not everything is the command line, servers and desktop computers. I have pride in my CLI, programming and admin skills, it's good to have pride, but too much pride is a defect, if you are too prideful to try new things.
You say tablets are incompatible with linux, NOTHING is incompatible with linux, as linux is mean to be free, you can adapt it to anything if you put effort in it, thats why the joke "But, does it run linux?" will never die, people run linux on the weirdest things, toasters, fridges, embeded systems, mainframes, clocks, routers, etc.
Some of those implementations may not be appear very useful to you, but others are things that we cannot live without. And even those that are "not useful", advance the knowledge, make people think out of the box, and sometimes, just sometimes, people thinking different, doing useless things, different things, have changed the world. Yes its just a tablet, yes the current ecosystems may be closed, yes, it may not change the world, but it's a start, a step in a less transited road. Linux is not something sacred, reserved to the realm of high-computers, it a frigging OS, that is mean to be used, shared, modified, and its precisely that freedom that you preach about what gives everyone the posibility of using it as he or she wants, from toasters to mainframes.
I see a lot of hate aimed at this little tablet/project, "its not powerful enough", "lame screen resolution", "closed source gpu drivers", "a tablet is a consumer device, not a creation device", etc.
To all people who hates, you want a powerful tablet, buy an Ipad, or a Nexus. Those are closed ecosystems you say, then create a new ecosystem, be a creator, not a consumer. You don't have the skills, time, resources?, Then shut up and stop criticizing those that are trying to make a change. You will say that is not open enough?, You mean, like, current computers, with those firmwares, drm, and secure boot?
You remind me of Sheldon Copper, "They are having fun the wrong way"