Are there any brands of more 'advanced' typewriters in which you can write as freely as in a laptop (alter previous written passages and visualize the whole pages without actually being printed)?
Roller Freewriter - Vunder
Maped Freewriter Roller Pen Erasable Blue Ink Pack of 3 : Amazon.co.uk: Stationery & Office Supplies
Maped Roller Erasable Freewriter Pen – StatMo.in – the largest online Stationery Store
Eliminate distractions with the Freewrite Traveler, a laptop that can only be used to type - NotebookCheck.net News
Maped Freewriter Roller Pen - Set of Three | Best Price and Reviews | Zulily
3154142266101 Maped Freewriter Mini Gel Pens, 0.7 Millimeters, Assorted Colors, 4-Pack (226610)
Freewrite Traveller Lets You Escape Writing Distractions - Mr Gadget