HSBC and JP Morgan starting full scale banking ops would mainly worry 2 banks - Citigroup and Standard Chartered. More the former which heavily relies on income from US/UK multinationals. Unless they intend to later acquire a local bank (ala Barclays-ABSA), they are likely to fall into the corporate segment of the market and steer clear of retail in the mid-term.
All my friends are heathens, take it slow. Wait for them to ask you who you know. Please don't make any sudden moves.