Transparency of prices is still a challenge in the industry. Measurement is another barrier. If both of them are tackled by service providers, more brands will feel encouraged to take up this medium of marketing. Innovations have also not kept up with brand aspirations. There are great ideas out there, but do-ability on scale often becomes a challenge.
There should be transparency and rationalisation in pricing. The buying process needs to be made simpler. Creative implementation is currently missing in the OOH space; maybe someone could start a marketplace for hoardings, that would be a great idea. The lack of ROI measurement is obviously a big challenge, which is why we are not consistent users of the medium.