Single-sided front swingarm; better motorcycle handling?

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Tier Motorsports have released a set of concept illustrations featuring a Yamaha R1....

Tier Motorsports have come up with a design concept - here pictured as part of a potential R1 prototype - that uses a single-sided front swingarm and four-bar steering system to create a perfectly vertical steering axis, as opposed to the tilted steering axes found on telescopic forks due to their necessary rake.
The patent pending Four-Bar Steering MechanismTM is the only vertical steering axis design available for motorcycles. The advantage of having a vertical steering axis include:
1. More controllable motorcycle on rougher roads. Road imperfections tending to steer the wheel will not be fed back into the handlebars like it does on standard forks equipped motorcycles. This is illustrated here in contrast with a theoretical worst case 90 degrees steering axis (courtesy of Tony Foale):
2. Goodbye handlebar wobble (movement, sometime violent, of the handlebar occurring at higher speeds). This is a result of the actual parts moving during steering being much lighter than on conventional forks. Eliminating steering dampers also mean a quicker steering available to the rider.
3. Custom steering trail. The trail is set by 2 spacers that can be replaced in minutes. Trail being the key value controlling handling characteristics now let the user choose the right value to match the road condition and their riding style (lower = more aggressive; higher = more stable).
4. Reduced steering forces. Does not raise the height of the center of gravity while steering.
5. Reduced steering angle needed at the wheel to achieve the same turning radius as a standard fork. This is a great advantage over other front swing arm steering design as it allows for narrower swing arm which gives more ground clearance in fully leaned turns.

Typically, the main disadvantages with front-swingarm systems (such as the one already in production on the hub-centre steered Bimota TESI 3D) are high costs, a ride feeling that takes some getting used to, a fairly limited steering lock and a general perception from the surprisingly conservative biker market that they don’t look like ‘real bikes.’