right now 1mb has a yearly potential of 52gb.. its been long enough now and we are at no where near 52gb for the total of 6 years. so i see very little reason to increase the blocksize right now.. if anything we should be coaxing the pools to stop delaying adding transactions and to actually start filling all blocks with tx's as they happen..
Raising blocksize causes another problem that is near 52gb blockchain data. Downloanding the whole chunk of blockchain takes a lot time and and hard disk space. No many ppl are patient and persistent enough to use the bitcoin qt. But then there are those who see the need and do provide the full nodes, it will all even out. Most day to day users of bitcoin do not want to use a full node, updating and having a 52gb chunk of data on their device, but having a dedicated machine, to support the blockchain is not that weird, or maybe it is, but most of the early adopters are a bit weird and nerdy
