Is information technology going to turn most "common goods" into private goods? Common goods, (not public) are so because they are non-excludable and rival.  Often this reflects the impracticality of excluding some users, rather than an absolute impossibility. For example, a park is public because it's impractical to be charging everybody that derives a benefit from using it. However, if it becomes easy to track who uses the park,  for how long,  who looks at the parks,  etc. then the park could be financed privately! 

Gadgets that track people's use of different goods could change which ones we deem to be excludable and which ones non-excludable....

A basic example is toll roads. If we mount GPS's on all cars and figure out how much tim they spend on the road, we could charge people for their use of streets directly. No more publicly financed road construction!
Many obstacles to converting common goods into private goods are legal or normative rather than technological. For example, the technology necessary for congestion pricing of traffic is long established and indeed in use since the 1970's in Singapore. The existence of electronic transmitters or plate readers (London) may make for finer gradations of pricing and simpler administration but haven't made for widespread adoption. In fact, many notably congested larger cities like New York and Hong Kong have had failed congestion charge proposals. Or take a crowded national park. If ticket prices at Yellowstone were \$115 per person like Disney World instead of the nominal \$30 per car they actually charge it wouldn't be nearly as crowded. Prices are well below the market clearing rate as a matter of public policy, not because there is a technological obstacle to charging more.