Roam sofa

The wheelchair has been somewhat left behind by the pace of modern technology. Attached batteries for 3mph pension runs is the peak of their development. I propose a cushioned, manoeuverable, high-performance chair capable of more than any car. Caterpillar tracks on large deformable wheels would make the chair more a personal minitank than the barren and perfunctory skeleton used by the world's paralysed today. Watch the able-bodied leave their cars (and yes, their legs) in droves. Stairs? No problem. Wheels big enough. Top speed? Around 50-60mph. It starts to rain? Goddam, the thing has a clear hood! Indoor, outdoor, off-road. And all from the comfort of your easy chair!