Considering the failures of past attempts at, or at least towards, Communism, I propose an idea.
There will be no need to seize the means of production from the bourgeoisie in the future.
Three main points:
Now, this hypotheses rests on the idea that by the time labor jobs would be mostly inaccessible, micro-production technology will be readily available at least on a community level ( a person(s) or a group(s) in your street/neighborhood/district having them).
As wealth disparity will grow due to loss of jobs because of automation, and micro-production technology becomes more and more advanced and relatively cheaply available, people will begin to turn to one another for help. Basic house furniture, essential accessories (combs, utensils, etc) and luxury accessories (Nerf guns or whatever) will be produced through micro-production, which will be accessible on a community level. The cost of using these micro-production machines will depend on how widespread and costly they are and for what purpose; for furniture it could cost money and be a community based MoP; for accessories it would be an inexpensive, personal machine, or perhaps per building if not per family. This is when we, dare I say it, enter socialism. This communal production, I assume, will bring a more localized political life, beginning the slow process of withering the state away. This could also in turn pave way to a more localized food production.
Intuitively, I thought this could produce a new petite-bourgeoisie class - the ones who at first hold the micro-MoP and charge money (unless, at first, an increasing significant minority will give them in good will to the community's service - not giving away but simply not charging, or not charging too much) - but I believe it will be overcome through either the eventual acquisition of micro-MoP by the rest of the population (through 3D printing or whatnot) or either through violence by bashing their skulls in and turning it into a community service.
With the gradual spread of micro-production and the fulfillment of the basic needs of the population, corporations will begin to lose profit, with no one needing to buy their cheap products and no one with money to buy their expensive ones, they will begin to lay off more workers, thus accelerating the process further. With capitalism now clinging to its life, these corporations will throw it a rescue wheel; lowering the prices of their luxury products, thus giving access to more technology for the general public. We are still at socialism, but as more technologies become more readily available, and people are capable to further and further support themselves, the need for a monetary system will vanish. The localized organization, communal support and self-sustainability will render the government and its services obsolete.
Welcome to Communism
This is the general conception. In an alternative scenario I could see seizing the means of production, however, not by the proles. The bourgeoisie will attempt to seize or outlaw micro-production technology, compensating the working class with meager gibsmedats. Then, the class war begins.
After the shift begins towards socialism, I believe then, and only then, those theories (Bordiga, Pancake, Rosa, etc) could be employed (albeit not rigidly) on the local level.