We've had heated baby wipe holders, and now it looks like we have powered strollers:
Peg Perego (are they M&P in the UK or something else ?) introduced a battery powered buggy last year:
Looky Here !
If high end pushcahirs like the Bugaboo / Xplory / Mountain Buggy can approach £500, you've got to guess that the powered market will grow in size...