I'v been riding on and off for the best part of a decade and trials has changed and evolved in a big way - in my opinion a good way.
I agree whole heartily with Mark. I would also like to add another insight around innovation. Incremental innovations tend to be on a shallow curve - meaning the first innovations make a larger impact than the next, so on and so forth. There have been some key innovations that I can remember - the introduction of the Monty X-Lite series when people where still using Giants and other Jump/XC frames. Every manufacturer since then has focused on the gradual reduction of weight, increase of strength and lowing of centre of gravity. These small increments frame on frame has fueled the manufacturers and the commercials of the sport. However after 10 years, that curve is now really beginning to slow. I actually took a break from the sport for about 3 years, recently getting back into it and to be honest - not much has changed in regards to frame design, manufacture and materials in the last 5 years. Which brings me back to Marks point.
The use of carbon fiber (finally!) is a new innovation but, one that offers little incremental advantage to a rider. This small advantage is important at the top level of riding but it's only going to be 99.98% of the total trials market that would see a noticeable advantage gained by switching from a mod Echo Lite to a mod Monty M5 Carbon is just not worth the investment for your average trials joe, or even most comp riders. In my opinion there needs to be a radical innovation that has a big impact on the riders ability and the bike as a tool - where that comes from, I have no idea.
Trials is expensive. Especially since you start off in this sport an a young age. £400/£500 for a bike is a huge sum of money at 14 years old - probably the most expensive thing you own at that age. Genuinely, I feel manufactures need to focus on producing good, low end, low margin bikes. You need to nurture the new starters and reduce the barriers (cost) to start in the sport. You will then have more riders in the sport as a total market, who will in the long term go on to buy the more expensive frames and components as they improve and become more financially well endowed. Thinking long term is critical to the development of the sport.
That's my two pence on the trials situation, right or wrong no one can argue that it's a challenging and interesting time for the sport.