Scalextric released their MotoGP concept at the British Toy Fair.

This was eagerly anticipated by all visitors.

The Bikes and riders are 1/18th scale - a size that was debated at length by Scalextric management. They were thinking of producing them in 1/32nd scale to be in scale with existing car layouts, but at that size would have been too small - 'dinky' sized and probably would have been perceived as a little kid's toy. At 1/18th scale the bikes fit comfortably in your hand and look like real bikes. 

They were using standard Sport track and using standard Scalextric controllers to run the show.

The bikes don't lean in to the curves, but that too was debated by the developers. They played with the idea, but didn't want to detract from the scale and quality of the bikes themselves by adding gadgets that made the bikes lean.

You may have seen an RC bike that leans in to the curve, but note its unscale-like body of the rider. They usually add weight to the rider to swing out, pulling the bike over.

They did mention that these were a first - the product had to get to market and there was always the possibility that some innovation might come up in the future.