To the many "TT Traditionalists" out there, and I include myself in this band, there are a number of points from the regulations in the earliest races that we should remember. We must avoid burying our collective heads in the sands of the experience our generations. The TT is not just about the great sounds and sights since the fifties although we find it too easy to ignore that fact.

Quoted from Wikipedia: "During the 1906 International Cup for Motor-Cycles held in Austria, the event was plagued by accusations of cheating and sharp practices. A conversation on the train journey home between the Secretary of the Auto-Cycle Club, Freddie Straight, Charlie Collier and Harry Collier brothers of the Matchless Motor-Cycles and the Marquis de Mouzilly St. Mars led to a suggestion for a race the following year for road touring motor-cycles based on the automobile races held in the Isle of Man on closed public roads. The new race was proposed by the Editor of "The Motor-Cycle" Magazine at the annual dinner of the Auto-Cycle Club held in London on 17 January 1907.[14] It was proposed that the races would run in two classes with single-cylinder machines to average 90 mpg and twin-cylinder machines to average 75 mpg fuel consumption. To emphasise the road touring nature of the motor-cycles there were regulations for saddles, pedals, mudguards and exhaust silencers.
For the 1908 race the fuel consumption was raised to 100 mpg for single-cylinder machines and 80 mpg for twin-cylinder machines and the use of pedals was banned. The race was won by Jack Marshall on a Triumph motor-cycle at an average speed of 40.49 mph. Due to the concern over increasing lap-speed, the 1910 event saw the capacity of the twin-cylinder machines reduced to 670 cc."

TTxGP is unlikely to provide many exciting sights or sounds immediately (although I'll be surprised if one or two amplified nostalgic sounds of the past are not emitted from some of the bikes). However, in the true spirit of the earliest TT pioneers' regulations, we will see a further reduction in petrol consumption and cylinder capacity, and a testing ground for future touring bikes.