There is a big difference between trading/leverage regulation and anti-money laundering (AML) anti terrorism regulation and the tax man. The AML and tax man are going to increase regulations regardless -
this is what makes opening accounts, closing accounts, freezing accounts a pain. This is different to the leverage regulation -the main killer for a lot of retail traders. (larger retail traders will get around this most likely as they can be registered as companies or have enough money to qualify as non retail, or will have no problems shifting to offshore)
AML and tax are not going to go away - and are a different animal. This is always moving to a more globally focused coverage.
My first thoughts are that it will generally only hurt those companies that are operating on the edge which will then lead to more concentration into the existing bigger brokers, which means less competition which generally leads to higher costs..... never good for anyone.
Most of the bigger more established companies already properly focus on the regulations and any costs to them will be marginal - it will hurt the smaller or more lax firms (might be a good thing). Clearly however the growth of the retail FX broking firms in recent years have been the driving force of reducing costs and spreads.....getting rid of competition is never good.
However - If it pushes people onto the exchange futures... I am with Thalestrader....that works for me, and I dont necessarily see it as such a bad thing. (I find it hard to sympathise when people complain about the costs and the spreads as they are pretty good.) They will probably introduce minis.They have said previously they are worried about the growth of the largely unregulated retail FX market and at least they may head off possible future problems.
Most retail people probably play with too much leverage. But a 10:1 restriction is probably too harsh.
NET RESULT: regulators are missing the point (but are at least trying to head off an issue in the future), regulation is here to stay and going to increase, competition decreases, costs increase (after massive improvements in recent years), US continues to decline in world dominance of markets and trading.
hmmmm.......not much really changing then.
(I actually don't think the exchanges should ever have been left to run at a profit as private companies - but thats a whole other issue. )
The bigger worry is Wall street not being able to run prop desks.... that is more likely to push up costs and reduce leverage and move people off shore of the US.